c programming problem solving pdf

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C Programming for Problem Solving

• Publisher: LAP LAMBERT Academic Publishing
• Editor: https://www.morebooks.shop/shop-ui/shop/product/9786206159667
• ISBN: 978-620-6-15966-7

• Gopal Narayan Singh University

• Central University of Bihar

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• C Programming Home
• ▼C Programming Exercises
• Basic Declarations and Expressions
• Basic Part-II
• Basic Algorithm
• Variable Type
• Input - Output
• Conditional Statements
• Do-While Loop
• Linked List
• Callback function
• Variadic function
• Inline Function
• File Handling
• Searching and Sorting
• C Programming Exercises, Practice, Solution

What is C Programming Language?

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. C was originally developed by Dennis Ritchie between 1969 and 1973 at Bell Labs. It has since become one of the most widely used programming languages of all time, with C compilers from various vendors available for the majority of existing computer architectures and operating systems.

The best way we learn anything is by practice and exercise questions. We have started this section for those (beginner to intermediate) who are familiar with C programming.

Hope, these exercises help you to improve your C programming coding skills. Currently, following sections are available, we are working hard to add more exercises. Please refer to this page for important C snippets, code, and examples before starting the exercises. Happy Coding!

List of C Programming Exercises :

• Basic Declarations and Expressions [ 150 Exercises with Solution ]
• Basic Part-II [ 7 Exercises with Solution ]
• Basic Algorithm [ 75 Exercises with Solution ]
• Variable Type [ 18 Exercises with Solution ]
• Input, Output [ 10 Exercises with Solution ]
• Conditional Statement [ 26 Exercises with Solution ]
• While Loop [ 11 Exercises with Solution ]
• Do-While Loop [ 12 Exercises with Solution ]
• For Loop [ 61 Exercises with Solution ]
• Array [ 107 Exercises with Solution ]
• Structure [ 9 Exercises with Solution ]
• Pointer [ 22 Exercises with Solution ]
• Linked List [ 64 Exercises with Solution ]
• Stack [ 17 Exercises with Solution ]
• Binary Heap (Tree-Based Structure) [ 9 Exercises with Solution ]
• Queue [ 13 Exercises with Solution ]
• Hash [ 10 Exercises with Solution ]
• Tree [ 10 Exercises with Solution ]
• Graph [ 10 Exercises with Solution ]
• Numbers [ 38 Exercises with Solution ]
• Math [ 38 Exercises with Solution ]
• String [ 41 Exercises with Solution ]
• Date Time [ 10 Exercises with Solution ]
• Function [ 12 Exercises with Solution ]
• Callback Function [ 11 Exercises with Solution ]
• Variadic Function [ 8 Exercises with Solution ]
• Inline Function [ 11 Exercises with Solution ]
• Recursion [ 21 Exercises with Solution ]
• File Handling [ 19 Exercises with Solution ]
• Search and Sorting [ 31 Exercises with Solution ]
• Challenges [ 35 exercises with solution ]
• C Snippets [29]
• More to Come !

[ Want to contribute to C exercises? Send your code (attached with a .zip file) to us at w3resource[at]yahoo[dot]com. Please avoid copyrighted materials.]

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

Popularity of Programming Language Worldwide, Nov 2023 compared to a year ago:

`

Rank	Change	Language	Share	Trend
1		Python	27.99 %	+0.0 %
2		Java	15.91 %	-0.8%
3		Javascript	9.18 %	-0.3%
4		C/C++	6.76 %	+0.2%
5		C#	6.67 %	-0.3 %
6		PHP	4.86 %	-0.3 %
7		R	4.45%	+0.4%
8		TypeScript	2.95 %	+0.1%
9		Swift	2.7 %	+0.6%
10		Objective-C	2.32%	+0.2%
11		Rust	1.98%	+0.3%
12		Go	1.98%	-0.0%
13		Kotlin	1.76 %	-0.1%
14		Matlab	1.6 %	+0.0%
15		Ada	1.02%	+0.2%
16		Ruby	1.0 %	-0.1 %
17		Dart	0.99 %	+0.1 %
18		Powershell	0.93 %	+0.0 %
19		VBA	0.93 %	-0.1 %
20		Scala	0.62 %	-0.1 %
21		Lua	0.62 %	0.0 %
22		Abap	0.58 %	+0.1 %
23		Visual Basic	0.55 %	-0.1 %
24		Julia	0.35 %	-0.0 %
25		Groovy	0.31 %	-0.1 %
26		Perl	0.31 %	-0.1 %
27		Haskell	0.27 %	-0.0 %
28		Cobol	0.25 %	-0.1 %
29		Delphi/Pascal	0.18 %	+0.2 %

Source : https://pypl.github.io/PYPL.html

TIOBE Index for November 2023

Nov 2023	Nov 2022	Change	Programming Language	Ratings	Change
1	1		Python	14.16%	-3.02%
2	2		C	11.77%	-3.31%
3	4		C++	10.36%	-0.39%
4	3		Java	8.35%	-3.63%
5	5		C#	7.65%	+3.40%
6	7		JavaScript	3.21%	+0.47%
7	10		PHP	2.30%	+0.61%
8	6		Visual Basic	2.10%	-2.01%
9	9		SQL	1.88%	+0.07%
10	8		Assembly language	1.35%	-0.83%
11	17		Scratch	1.31%	+0.43%
12	24		Fortran	1.30%	+0.74%
13	11		Go	1.19%	+0.05%
14	15		MATLAB	1.15%	+0.14%
15	28		Kotlin	1.15%	+0.68%
16	14		Delphi/Object Pascal	1.14%	+0.07%
17	18		Swift	1.04%	+0.17%
18	19		Ruby	0.99%	+0.14%
19	12		R	0.93%	-0.20%
20	20		Rust	0.91%	+0.16%

Source : https://www.tiobe.com/tiobe-index/

List of Exercises with Solutions :

• HTML CSS Exercises, Practice, Solution
• JavaScript Exercises, Practice, Solution
• jQuery Exercises, Practice, Solution
• jQuery-UI Exercises, Practice, Solution
• CoffeeScript Exercises, Practice, Solution
• Twitter Bootstrap Exercises, Practice, Solution
• C# Sharp Programming Exercises, Practice, Solution
• PHP Exercises, Practice, Solution
• Python Exercises, Practice, Solution
• R Programming Exercises, Practice, Solution
• Java Exercises, Practice, Solution
• SQL Exercises, Practice, Solution
• MySQL Exercises, Practice, Solution
• PostgreSQL Exercises, Practice, Solution
• SQLite Exercises, Practice, Solution
• MongoDB Exercises, Practice, Solution

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• Weekly Trends and Language Statistics

C programming examples, exercises and solutions for beginners

Fundamentals.

• Hello world program in C
• Basic input/output
• Basic IO on all data types
• Perform arithmetic operations
• Find area and perimeter of rectangle
• Find diameter and area of circle
• Find area of triangle
• Find angles of triangle
• Temperature conversion
• Length conversion
• Days conversion
• Find power of a number
• Find square root
• Calculate simple interest
• Calculate compound interest
• Find range of data types

Bitwise Operator

• Check Least Significant Bit (LSB)
• Check Most Significant Bit (MSB)
• Get nth bit of a number
• Set nth bit of a number
• Clear nth bit of a number
• Toggle nth bit of a number
• Highest set bit of a number
• Lowest set bit of a number
• Count trailing zeros of binary number
• Count leading zeros of binary number
• Flip bits of a number
• Rotate bits of a number
• Decimal to binary
• Swap two numbers
• Check even or odd
• View all Bitwise operator examples →

Ternary Operator

• Maximum of two numbers
• Maximum of three numbers
• Check leap year
• Check alphabet
• View all ternary operator examples →
• Find maximum of two numbers
• Find maximum of three numbers
• Check negative, positive or zero
• Check divisibility
• Check alphabet character
• Check vowel or consonant
• Check alphabet, digit or special character
• Check uppercase or lowercase
• Print day of week
• Find number of days in month
• Find roots of quadratic equation
• Calculate profile/loss
• View all if else examples →

Switch case

• Find total days in month
• Check positive, negative or zero
• Simple calculator application
• View all switch case examples →

Loop/Iteration

• Print natural numbers from 1 to n
• Print alphabets from a to z
• Print even numbers from 1 to n
• Print sum of all numbers from 1 to n
• Print sum of all odd numbers from 1 to n
• Print multiplication table of n
• Find number of digits in a number
• Find first and last digit
• Find sum of first and last digit
• Swap first and last digit
• Find sum of digits of a number
• Find reverse of a number
• Find frequency of digits in a number
• Find power of a number using loop
• Find factorial of a number
• Find HCF of two numbers
• Find LCM of two numbers
• View all loop examples →

Number system and conversion

• Find one's complement
• Find two's complement
• Binary to octal conversion
• Binary to decimal conversion
• Binary to hexadecimal conversion
• Octal to binary conversion
• Octal to decimal conversion
• Octal to hexadecimal conversion
• Decimal to binary conversion
• Decimal to octal conversion
• Decimal to hexadecimal conversion
• Hexadecimal to binary conversion
• Hexadecimal to octal conversion
• Hexadecimal to decimal conversion
• View all conversion examples →

Star patterns

• Pascal triangle generation
• Square star pattern
• Hollow square star pattern
• Hollow square star pattern with diagonal
• Rhombus star pattern
• Hollow rhombus star pattern
• Right triangle star pattern
• Hollow right triangle star pattern
• Inverted right triangle star pattern
• Mirrored inverted right triangle star pattern
• Pyramid star pattern
• Inverted pyramid star pattern
• Diamond star pattern
• Plus starpattern
• X star pattern
• 8 star pattern
• Heart star with name pattern
• View all star pattern examples →

Number patterns

• Square number pattern
• Right triangle number pattern
• Inverted right triangle
• Triangle with zero filled
• Half diamond pattern
• Half diamond star bordered pattern
• X number pattern
• View all number pattern examples →
• Find cube using functions
• Diameter & area of circle using functions
• Maximum and minimum using functions
• Check even odd using functions
• Check Prime number using functions
• Find all prime numbers using functions
• Find all strong numbers using functions
• Find all armstrong numbers using functions
• Find all perfect numbers using functions
• View all function examples →
• Find power using recursion
• Print natural numbers using recursion
• Print even numbers using recursion
• Sum of natural numbers using recursion
• Sum of even/odd numbers using recursion
• Find reverse using recursion
• Check palindrome using recursion
• Find sum of digits using recursion
• Find factorial using recursion
• Generate nth Fibonacci term using recursion
• Find HCF (GCD) using recursion
• Find LCM using recursion
• Sum of array elements using recursion
• View all recursion examples →
• Input and display array elements
• Sum of all array elements
• Find second largest element in array
• Copy one array to another
• Insert new element in array
• Delete an element from array
• Find frequency of array elements
• Merge two array to third array
• Delete duplicate elements from array
• Reverse an array
• Search an element in array
• Sort an array
• Left rotate an array
• Right rotate an array
• View all array examples →

Matrix (2D array)

• Add two matrices
• Scalar matrix multiplication
• Multiply two matrices
• Check if two matrices are equal
• Sum of diagonal elements of matrix
• Interchange diagonal of matrix
• Find upper triangular matrix
• Find sum of lower triangular matrix
• Find transpose of triangular matrix
• Find determinant of a matrix
• Check identity matrix
• Check sparse matrix
• Check symmetric matrix
• View all matrix examples →
• Find length of string
• Copy string to another string
• Concatenate two strings
• Compare two strings
• Convert lowercase to uppercase
• Find reverse of a string
• Check palindrome
• Reverse order of words
• Search a character in string
• Search a word in string
• Find highest occurring character
• Remove all duplicate characters
• Replace a character in string
• Trim whitespace from string
• View all string examples →
• Create, initialize and use pointer
• Add two numbers using pointers
• Swap two numbers using pointers
• Access array using pointers
• Copy array using pointers
• Reverse array using pointers
• Access 2D array using pointers
• Multiply matrices using pointers
• Copy strings using pointers
• Concatenate strings using pointers
• Compare strings using pointers
• Reverse strings using pointers
• Sort array strings using pointers
• Return multiple values from function using pointers
• View all pointers examples →
• Create file and write contents
• Read file contents and display
• Append contents to file
• Compare two files
• Copy one file to another
• Merge two files
• Remove a word from file
• Remove a line from file
• Replace a word in file
• Replace a line in file
• Print source code
• Convert uppercase to lowercase in file
• Find properties of file
• Check if file or directory exists
• Rename a file or directory
• List of files recursively
• View all files handling examples →

Macros/Pre-processor directives

• Create custom header file
• Define, undefine and redefine a macro
• Find sum using macro
• Find square and cube using macro
• Check even/odd using macro
• Find maximum or minimum using macro
• Check lowercase/uppercase using macro
• Swap two numbers using macro
• Multiline macros

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Problem solving with C

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Home » C programming language

C Programs with Solutions

This section contains popular C programs with solution. Learn and practice these programs to test and enhance your C skills. Last updated : April 01, 2023

The best way to learn C programming is by practicing and solving the C programs (C problems). We have 1000+ C programs with solutions which are categorized below. Practice these C programs to learn and enhance your C problem-solving skills.

List of C programs

Practice the C programs based on the categories, library functions, advanced, top searched, and latest.

C programs by categories

• C Basic and Conditional Programs 90
• C switch case programs 06
• C 'goto' programs 10
• Bitwise related Programs 32
• Looping (for, while, do while) Programs 18
• C String Manipulation programs 10
• C String programs 50
• String User Define Functions Programs 11
• Recursion Programs 13
• Number (Digits Manipulation) Programs 10
• Number System Conversion Programs 15
• Star/Pyramid Programs 17
• Sum of Series Programs (set 1) 05
• Sum of Series Programs (set 2) 13
• Pattern printing programs 01
• User Define Function Programs (1) 05
• User Define Function Programs (2) 13
• One Dimensional Array Programs 58
• Two Dimensional Array (Matrix) Programs 21
• File Handling Programs 32
• Structure & Union Programs 12
• Pointer Programs 13
• Dynamic Memory Allocation Programs 05
• Command Line Arguments Programs 06
• Common C program Errors 22
• C scanf() programs 11
• C preprocessor programs 24
• C typedef programs 03
• C SQLite programs 11
• C MySQL programs 09
• C Tricky Programs 07
• Misc Problems & Solutions 05

C programs on standard library functions

• ctype.h Library Functions (Set 1)
• ctype.h Library Functions (Set 2)
• string.h Library Functions
• conio.h Library Functions
• dos.h Library Functions
• math.h Library Functions
• graphics.h Library Functions
• assert.h Library Functions
• stdio.h Library Functions

Advance C programs

• C program to create your own header file/ Create your your own header file in C
• gotoxy(),clrscr(),getch(),getche() for GCC, Linux.
• fork() function explanation and examples in Linux C
• C program to print character without using format specifiers.
• C program to find Binary Addition and Binary Subtraction.
• C program to print weekday of given date.
• C program to format/extract ip address octets
• C program to check given string is a valid IPv4 address or not.
• C program to extract bytes from an integer (Hexadecimal) value
• C program to store date in an integer variable

Top searched C programs

Here is the list of most important/useful programs searched on the web .

Top visited programs on IncludeHelp

• Pattern Programs in C
• C program to design calculator with basic operations using switch
• C program to find factorial of a number
• C program to check whether number is Perfect Square or not
• C program to find SUM and AVERAGE of two numbers
• C program to convert temperature from Fahrenheit to Celsius and Celsius to Fahrenheit
• C program to read and print an employee's detail using structure
• Dynamic Memory Allocation programs
• C program to convert number from Decimal to Binary
• C program to check whether number is Palindrome or not

Top searched programs on the web

• First C program to print "Hello World".
• C program to find factorial of a number.
• C program to swap two numbers without using third variable.
• C program to check whether a number if Armstrong or not.
• C program to check whether a number if Even or Odd.
• C program to print all leap years from 1 to N.
• C program to calculate employee gross salary.
• C Program to print tables of numbers from 1 to 20.
• C program to print star/pyramid series.
• C program to convert temperature from Celsius to Fahrenheit and vice versa.
• C program to convert number from Decimal to Binary.
• C program to convert number from Binary to Decimal.
• C program to print ASCII Table.
• C program to get and set current system date and time.
• C program to run dos command.

Latest C programs

• C program to generate random numbers within a range
• C program to compare strings using strcmp() function
• Interchange the two adjacent nodes in a given circular linked list | C program
• Find the largest element in a doubly linked list | C program
• Convert a given singly linked list to a circular list | C program
• Implement Circular Doubly Linked List | C program
• Print the Alternate Nodes in a Linked List without using Recursion
• Print the Alternate Nodes in a Linked List using Recursion
• Find the length of a linked list without using recursion
• Find the length of a linked list using recursion
• Count the number of occurrences of an element in a linked list without using recursion
• Count the number of occurrences of an element in a linked list using recursion
• C program to convert a Binary Tree into a Singly Linked List by Traversing Level by Level
• C program to Check if nth Bit in a 32-bit Integer is set or not
• C program to swap two Integers using Bitwise Operators
• C program to replace bit in an integer at a specified position from another integer
• C program to find odd or even number using bitmasking
• C program to check whether a given number is palindrome or not using Bitwise Operator
• C program to count number of bits set to 1 in an Integer
• C program to check if all the bits of a given integer is one (1)
• C program to find the Highest Bit Set for any given Integer
• C program to Count the Number of Trailing Zeroes in an Integer
• C Program to find the Biggest Number in an Array of Numbers using Recursion
• C program to accept Sorted Array and do Search using Binary Search
• C Program to Cyclically Permute the Elements of an Array
• C program to find two smallest elements in a one dimensional array
• Write your own memset() function in C
• memset() function in C with Example
• Write your own memcpy() function in C
• memcpy() function in C with Example

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C Programming Questions and Answers PDF | C Language

Here is the list of the top 500 C Programming Questions and Answers. Download C Programming Questions PDF free with Solutions. All solutions are in C language. All the solutions have 4 basic parts programming problems, logic & explanation of code, programming solutions code, and the output of the program.

To summarize our programming questions list does not contain only answers In addition, it also contains all the aspects of the problem, if any programming questions have multiple solutions then we try to add all possible solutions to the problem programming problem.

We also divide all the c programming questions into multiple levels. Levels are nothing but the complexity and toughness of programming questions. We have 5 levels, Newbie, Easy, Medium, Master, and Legendary . Therefore all the c programming questions are also separated into 14 categories. Download C Programming Questions and Answers PDF.

Table of Contents

Below is the List of C Programming Questions for Practice.

List of C Programming Questions and Answers by Categories.

• If / Else Statement
• While loop or While-Do loop
• Do-While loop
• Switch Case
• File Handling
• Bubble Sort
• Bucket or Radix Sort
• Selection Sort
• Insertion Sort
• Binary Search
• Linear Search
• Recursive Binary Search
• Number Series
• StartPattern Printing

Simple C Programming Questions and Answers List

• Area and Circumference of a Circle
• Print Ascii Value of the Character
• Area of Triangle
• Convert a Person’s Name into an Abbreviated
• Simple Interest
• Gross Salary of an Employee
• Percentage of 5 Subjects
• Converting Temperature Celsius into Fahrenheit
• The Display Size of the Different Datatype
• Factorial of a Given Number
• Read Integer (N) and Print the First Three Powers (N^1, N^2, N^3)
• Area of a Circle
• LCM of Two Numbers
• GCD of Two Numbers

If / Else Statement Questions and Answers

• The Greatest Number Among the Given Three Numbers
• The Number Is Positive or Negative
• Character Is Vowel or Consonant
• A Character Is an Alphabet or Not
• Uppercase, Lowercase, Special Character, or Digit
• The Number Is Even or Odd
• Greatest of Two Numbers
• Greatest Among Three Numbers
• The Date Is Correct or Not
• Voting Eligibility Checker
• Find the maximum between two numbers.
• Find the maximum between the three numbers.
• Check whether a number is negative, positive or zero.
• Check whether a number is divisible by 5 and 11 or not.
• Find whether a number is even or odd.
• Check whether a year is a leap year or not.
• Check whether a character is an alphabet or not.
• Input any alphabet and check whether it is a vowel or consonant.
• Input any character and check whether it is the alphabet, digit or special character.
• Check whether a character is an uppercase or lowercase alphabet.
• Input the week number and print the weekday.
• Input the month number and print the number of days in that month.
• Count the total number of notes in a given amount.
• Input the angles of a triangle and check whether the triangle is valid or not.
• Input all sides of a triangle and check whether the triangle is valid or not.
• Check whether the triangle is equilateral, isosceles or scalene.
• Find all roots of a quadratic equation.
• Calculate profit or loss.

Loops- List of C Programming Questions and Answers

While loop or while-do loop questions list.

• Reverse A given Number
• Find Number Is Armstrong Or Not
• Calculate the Sum of Natural Numbers
• Display Fibonacci Series
• Find the LCM of two Numbers
• Reverse a Number
• Check Whether a Number is A Palindrome or Not
• Count the Number of Digits of an Integer
• Find A Generic Root Of the Number
• Print A Calendar Taking Input From User Using Loop
• Number Is Divisible By 11 Using (VEDIC MATH)
• Denomination of an Amount

Do-While Loop Questions List

For loop questions list.

• Generate IP (Internet Protocol) Addresses Using
• Print Multiplication Table Using
• Sort A Float Array In Ascending And Descending Order Using
• Find the GCD of two Numbers Using

Switch Case- C Programming Questions and Answers List

• Temperature Conversion Celcius To Fahrenheit And Vice Versa
• Find The Day
• Find A Grade Of Given Marks or ( Find a Grade of Given Marks Using Switch Case )
• Find the Radius, Circumference and Volume of the Cylinder
• Remove All Vowels From A String
• Print the day of the week name using a switch case.
• Print the total number of days in a month using a switch case.
• Check whether an alphabet is a vowel or consonant using a switch case.
• Find the maximum between two numbers using a switch case.
• Check whether a number is even or odd using a switch case.
• Check whether a number is positive, negative or zero using a switch case.
• Find the roots of a quadratic equation using a switch case.
• Create a Simple Calculator using a switch case.

Array Questions List

• Insert An Element Desired or Specific Position In An Array
• Remove Duplicates Items In An Array
• Delete Element From Array At Desired Or Specific Position
• Print “I AM IDIOT” Instead Of Your Name Using Array
• Check String Is Palindrome Or Not Using For Loop
• Convert All Input String Simultaneously Into Asterisk ( * )
• Read and print elements of the array. – using recursion.
• Print all negative elements in an array.
• The sum of all array elements. – using recursion.
• Find a maximum and minimum element in an array. – using recursion.
• Get the second largest element in an array.
• Count the total number of even and odd elements in an array.
• Count the total number of negative elements in an array.
• Copy all elements from an array to another array.
• Insert an element in an array.
• Delete an element from an array at the specified position.
• Count the frequency of each element in an array.
• Print all unique elements in the array.
• Count the total number of duplicate elements in an array.
• Delete all duplicate elements from an array.
• Merge two arrays to the third array.
• Find the reverse of an array.
• Put even and odd elements of an array in two separate arrays.
• Search an element in an array.
• Sort array elements in ascending or descending order.
• Sort even and odd elements of the array separately.
• Left rotate an array.
• Right-rotate an array.

Matrix Questions- Download C Programming Questions and Answers

• Add two matrices.
• Subtract two matrices.
• Perform scalar matrix multiplication.
• Multiply two matrices.
• Check whether the two matrices are equal or not.
• SUM of the main diagonal elements of a matrix.
• Find the sum of minor diagonal elements of a matrix.
• Find the sum of each row and column of a matrix.
• Interchange diagonals of a matrix.
• The upper triangular matrix.
• Find a lower triangular matrix.
• SUM of the upper triangular matrix.
• Find the sum of a lower triangular matrix.
• The transpose of a matrix.
• Find the determinant of a matrix.
• Identity matrix in C.
• Check the sparse matrix.
• Check the symmetric matrix.
• Recommended posts

String Questions List

String C Programming Questions and Answers.

• String Char-Case Change
• A String is Palindrome or Not
• A String Is an Anagram or Not
• Find the length of a string.
• Copy one string to another string.
• Concatenate two strings.
• Compare two strings.
• Convert lowercase string to uppercase.
• Convert uppercase string to lowercase.
• Toggle the case of each character of a string.
• Find the total number of alphabets, digits or special characters in a string.
• Count the total number of vowels and consonants in a string.
• Count the total number of words in a string.
• Find the reverse of a string.
• Check whether a string is a palindrome or not.
• Reverse the order of words in a given string.

String Questions List: Level Up

• Find the first occurrence of a character in a given string.
• Find the last occurrence of a character in a given string.
• Search all occurrences of a character in a given string.
• Count occurrences of a character in a given string.
• Find the highest frequency character in a string.
• Find the lowest frequency character in a string.
• Count the frequency of each character in a string.
• Remove the first occurrence of a character from a string.
• Remove the last occurrence of a character from a string.
• Delete all occurrences of a character from a string.
• Remove all repeated characters from a given string.
• Replace the first occurrence of a character with another in a string.
• Replace the last occurrence of a character with another in a string.
• Put all occurrences of a character with another in a string.
• Find the first occurrence of a word in a given string.
• Find the last occurrence of a word in a given string.
• Search all occurrences of a word in a given string.
• Count occurrences of a word in a given string.
• Remove the first occurrence of a word from a string.
• Remove the last occurrence of a word in a given string.
• Delete all occurrences of a word in a given string.
• A Trim leading white space characters from a given string.
• Trim trailing white space characters from a given string.
• Trim both leading and trailing white space characters from a given string.
• Remove all extra blank spaces from the given string.

Function Questions List

• Cube of any number using the function.
• Find the diameter, circumference and area of a circle using functions.
• Maximum and minimum between two numbers using functions.
• Check whether a number is even or odd using functions.
• Check whether a number is a prime, Armstrong or perfect number using functions.
• Find all prime numbers between the given interval using functions.
• Print all strong numbers between the given interval using functions.
• Armstrong numbers between the given interval using functions.
• Print all perfect numbers between the given interval using functions.
• Find the power of any number using recursion.
• Print all natural numbers between 1 to n using recursion.
• Print all even or odd numbers in a given range using recursion.
• The sum of all natural numbers between 1 to n using recursion.
• Find the sum of all even or odd numbers in a given range using recursion.
• Find the reverse of any number using recursion.
• Check whether a number is a palindrome or not using recursion.
• Find the sum of digits of a given number using recursion.
• Find the factorial of any number using recursion.
• Generate nth Fibonacci term using recursion.
• Find the GCD (HCF) of two numbers using recursion.
• Find the LCM of two numbers using recursion.
• Display all array elements using recursion.
• Find the sum of elements of the array using recursion.
• Find maximum and minimum elements in an array using recursion.
• Stricmp() Function (Case In-Sensitive Compare)
• strncat() Function (String Concatenate)
• Strstr() Function (Sub-String)
• Strlwr() Function (To Lower-Case)
• Strupr() Function (To Upper-Case)
• Strncmp() Compare & Chars
• strncpy() Copy N Chars
• Strrev() String Reverse
• Strlen() String Length
• Strcat() String Concatenate
• Strcmp() String Compare
• Strcpy() Copy the String

Pointer Questions List in C Language

• Add two numbers using pointers.
• Swap two numbers using pointers.
• Input and print array elements using a pointer.
• Copy one array to another using pointer.
• Swap two arrays using pointers.
• Reverse an array using pointers.
• Search an element in an array using pointers.
• Access two-dimensional array using pointers.
• Add two matrices using pointers.
• Multiply two matrices using pointers.
• Find the length of the string using pointers.
• In short How to Copy one string to another using pointer.
• Concatenate two strings using pointers.
• Compare two strings using pointers.
• Find the reverse of a string using pointers.
• Sort array using pointers.
• Return multiple values from a function using pointers.

File Handling- Programming Questions and Answers in C Language

• Create a file and write contents, save and close the file.
• Read file contents and display them on the console.
• Read numbers from a file and write even, odd and prime numbers to separate files.
• Append content to a file.
• Compare two files.
• How to Copy contents from one file to another file.
• Merge two files into the third file.
• Count characters, words and lines in a text file.
• Delete a word from a text file.
• Remove the specific line from a text file.
• Remove empty lines from a text file.
• Find the occurrence of a word in a text file.
• Count occurrences of a word in a text file.
• Count occurrences of all words in a text file.
• Find and replace a word in a text file.
• Replace a specific line in a text file.
• Print the source code of the same program.
• Convert uppercase to the lowercase character and vice versa in a text file.
• Find properties of a file using the stat() function.
• Check if a file or directory exists.
• Rename a file using rename() function.
• List all files and sub-directories recursively.

Sorting in C Language

• Bubble Sort in C
• Bucket or Radix Sort in C
• Shell Sort in C
• Merge Sort in C
• Heap Sort in C
• Selection Sort in C
• Insertion Sort in C

Searching in C Language

• Binary Search in C
• Linear Search in C
• Recursive Binary Search in C

Tricky Questions for Expert Only | Legendary level

This is a high-level section for legendary programmers or thinkers, this section can help you to become a pro programmer. In this section, two categories are the number pattern and the start pattern. I just keep the pattern programming and number programming separate. All the tricky questions or we can say that number programming or start pattern programming solutions of c programming questions and answers are below.

• Number Series- Questions and Answers
• Start Pattern Printing- C Programming Questions and Answers
• Puzzles Questions

Puzzles Questions list

• Print numbers from 1 to N without using a semicolon.
• The sum of two numbers without using any operator
• How to show the memory representation of c variables?
• Condition to print “HelloWorld”
• Modify/add only one character and print ‘*’ exactly 20 times
• Sum the digits of a given number in a single statement.

Hacker Rank 30 Days of Code Solution.

99+ C Programming Questions and Answers PDF Check Here .

Top 99+ Basic C Programs for Practice PDF | All C Programs PDF

Download 99+ All C Programs for Practice PDF Free with solutions in single care but before that, We are Welcoming you to the c programs practice and solution page. You can find all c problems and practice them. In the end, you can download the Basics C Programs List PDF absolutely free. We have provided you with the solution to the problem along with complete logic and explanation related to the programming problems. Our mostly solution is covered with examples, so you can relate easily to the original problem. Below are the Top 99+ Basic C Programs for Practice,

C Programs for Practice- Table of Content

• Simple C Programs for Practice
• If/Else Statements
• Switch Case

1. Basic Simple C Programs for Practice

• C Program to Find Area And Circumference of Circle
• Print the ASCII Value of the Character
• C Program to Find Area of Triangle Given Base And Height
• C Program to Convert a Person's Name in Abbreviated Form
• Calculate a Simple Interest
• Gross Salary Program in C Programs
• C Program to Find Percentage of 5 Subjects
• Convert Temperature Celsius into Fahrenheit
• Write a C Program to Display The Size of Different Data Types
• a Check Number Is Positive or Negative
• Find the Character Is Vowel or Not
• Calculate the Factorial of a Given Number
• C Program to Read Integer and Print First Three Powers (N^1, N^2, N^3)

2. If/Else C Programs to Practice

• C Program to Check Uppercase or Lowercase or Digit or Special Character
• Find the Greatest Among Three Numbers
• Checking Whether You Are Eligible for Voting or Not
• Program for Finding Greater Between Two Number
• Checking Number Is Even or Odd
• Leap Year Program in C with Logic, Explanation and Output
• Check Character Is a Vowel or Not Using If-Else
• Given Date Month and the Year Is Correct or Not Using If-Else
• Largest of Three Numbers in C Using Nested if Else

3. Loops C Programs for Practice PDF

• C Program to Reverse a Number Using FOR Loop
• Program of Armstrong Number in C Using For Loop & While Loop
• Calculate the Sum of Natural Numbers Using the While Loop
• Write a C Program to Print the Multiplication Table of N
• Fibonacci Series Program in C Using DO While Loop
• Find the GCD of Two Numbers Using Loop
• Program to Find LCM of Two Numbers in C Using While Loop
• Palindrome Program in C Using While Loop
• Count the Number of Digits of an Integer Using the While Loop
• Find a Generic Root of a Number Using While Loop
• C Program to Print The Calendar of a Month of 31 Days
• C Program To Generate IP Addresses(IPv4 & IPv6) Using For Loop
• Check Whether a Number Is Divisible by 11 Using (Vedic Maths)
• C Program to Sort an Array in Ascending And Descending Order
• Denomination of an Amount Using While Loop

4. Switch Case Basic C Programs List

• C Program to Convert Celsius to Fahrenheit And Vice Versa
• C Program to Print Day of Week Name Using Switch Case
• Write a C Program to Make a Simple Calculator Using Switch Case
• Write a C Program to Find the Grade of a Student Using Switch Case
• Finding Radius Circumference
• Remove All Vowels from a String

5. Array C Programs List PDF

• Insert an Element at a Specific Position in an Array in C Program
• C Program for Remove Duplicates Items
• Delete Element from an Array at a Desired or Specific Position
• Print "I AM IDIOT" Instead of Your Name Using an Array
• String Palindrome Program in C With Explanation
• Convert All Input String Simultaneously into an Asterisk *

6. String Programs

• C Program for Remove All Vowels from a String
• C Program to Delete a Substring From a String
• Convert String to Integer Without Using Library Functions
• C Program to Convert Lowercase to Uppercase And Vice Versa
• Program for Reverse a String Using Library
• Write a Program to Reverse a String in C
• Compare Two String Using STRCMP Function
• Find the Number of Vowels, Consonants, Digits and White Space Character

Free Download Basic 99+ C Programs for Practice PDF

7. functions c programs list pdf.

• Bubble Sort Using a Function in Ascending and Descending Order
• Convert Binary Numbers to Decimal or Decimal Numbers to Binary
• Convert Octal Numbers to Decimals and Vice Versa
• C Program for Convert Binary to Octal and Vice Versa
• Display Prime Numbers Between Intervals
• C Program to Check Prime or Armstrong Number

8. C Programs for Practice PDF in Pointer

• C Program for Reverse a String Using Pointer
• Write a C Program to Compare Two Strings Using Pointers
• Open a File(open a Program Itself) Using Pointer

9. Structure Programs

• Structure Program for Student Details in C Programs
• Structure Program For Student Details in C Programs
• C Program to Add Two Distances (in Inch-feet) System Using Structures
• Add Two Complex Numbers by Passing Structure with Function
• Calculate the Difference Between the Two Time Periods (HH: MM: SS)
• Structure Program For Student Details in C [Using Structure]

10. Patterns Basic C Programs List

• Home Pattern with Help of *
• Diamond Star * Pattern
• Left Half Diamond Star Pattern
• Right Half Diamond Star Pattern
• Hollow Diamond * Pattern
• Pyramid Pattern Using Star *
• Right Arrow Star Pattern
• Left Arrow * Pattern
• Pascal Triangle Using a Number
• Christmas Tree Pattern Using *

11. Sorting C Programs

• BUBBLE Sort in Ascending and Descending Order
• SELECTION Sort in Ascending and Descending Order
• INSERTION Sort in Ascending Order
• QUICK Sort in Ascending Order
• MERGE Sort in Ascending Order
• Heap Sort in Ascending Order with Complexity

12. Searching- All C Programs List PDF

• Linear Search Program in C
• Binary Search Program in C

Similar to C Programs to Practice

• C Program to Reverse the Sentence Word by Word

How Can I Practice C Programming at Home?

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C Data Types

C operators.

• C Input and Output
• C Control Flow
• C Functions
• C Preprocessors

C File Handling

• C Cheatsheet

C Interview Questions

C programming language tutorial.

• C Language Introduction
• Features of C Programming Language
• C Programming Language Standard
• C Hello World Program
• Compiling a C Program: Behind the Scenes
• Tokens in C
• Keywords in C

C Variables and Constants

• C Variables
• Constants in C
• Const Qualifier in C
• Different ways to declare variable as constant in C
• Scope rules in C
• Internal Linkage and External Linkage in C
• Global Variables in C
• Data Types in C
• Literals in C
• Escape Sequence in C
• Integer Promotions in C
• Character Arithmetic in C
• Type Conversion in C

C Input/Output

• Basic Input and Output in C
• Format Specifiers in C
• printf in C
• Scansets in C
• Formatted and Unformatted Input/Output functions in C with Examples
• Operators in C
• Arithmetic Operators in C
• Unary operators in C
• Relational Operators in C
• Bitwise Operators in C
• C Logical Operators
• Assignment Operators in C
• Increment and Decrement Operators in C
• Conditional or Ternary Operator (?:) in C
• sizeof operator in C
• Operator Precedence and Associativity in C

C Control Statements Decision-Making

• Decision Making in C (if , if..else, Nested if, if-else-if )
• C - if Statement
• C if...else Statement
• C if else if ladder
• Switch Statement in C
• Using Range in switch Case in C
• while loop in C
• do...while Loop in C
• For Versus While
• Continue Statement in C
• Break Statement in C
• goto Statement in C
• User-Defined Function in C
• Parameter Passing Techniques in C
• Function Prototype in C
• How can I return multiple values from a function?
• main Function in C
• Implicit return type int in C
• Callbacks in C
• Nested functions in C
• Variadic functions in C
• _Noreturn function specifier in C
• Predefined Identifier __func__ in C
• C Library math.h Functions

C Arrays & Strings

• Properties of Array in C
• Multidimensional Arrays in C
• Initialization of Multidimensional Array in C
• Pass Array to Functions in C
• How to pass a 2D array as a parameter in C?
• What are the data types for which it is not possible to create an array?
• How to pass an array by value in C ?
• Strings in C
• Array of Strings in C
• What is the difference between single quoted and double quoted declaration of char array?
• C String Functions
• Pointer Arithmetics in C with Examples
• C - Pointer to Pointer (Double Pointer)
• Function Pointer in C
• How to declare a pointer to a function?
• Pointer to an Array | Array Pointer
• Difference between constant pointer, pointers to constant, and constant pointers to constants
• Pointer vs Array in C
• Dangling, Void , Null and Wild Pointers in C
• Near, Far and Huge Pointers in C
• restrict keyword in C

C User-Defined Data Types

• C Structures
• dot (.) Operator in C
• Structure Member Alignment, Padding and Data Packing
• Flexible Array Members in a structure in C
• Bit Fields in C
• Difference Between Structure and Union in C
• Anonymous Union and Structure in C
• Enumeration (or enum) in C

C Storage Classes

• Storage Classes in C
• extern Keyword in C
• Static Variables in C
• Initialization of static variables in C
• Static functions in C
• Understanding "volatile" qualifier in C | Set 2 (Examples)
• Understanding "register" keyword in C

C Memory Management

• Memory Layout of C Programs
• Dynamic Memory Allocation in C using malloc(), calloc(), free() and realloc()
• Difference Between malloc() and calloc() with Examples
• What is Memory Leak? How can we avoid?
• Dynamic Array in C
• How to dynamically allocate a 2D array in C?
• Dynamically Growing Array in C

C Preprocessor

• C Preprocessor Directives
• How a Preprocessor works in C?
• Header Files in C
• What’s difference between header files "stdio.h" and "stdlib.h" ?
• How to write your own header file in C?
• Macros and its types in C
• Interesting Facts about Macros and Preprocessors in C
• # and ## Operators in C
• How to print a variable name in C?
• Multiline macros in C
• Variable length arguments for Macros
• Branch prediction macros in GCC
• typedef versus #define in C
• Difference between #define and const in C?
• Basics of File Handling in C
• C fopen() function with Examples
• EOF, getc() and feof() in C
• fgets() and gets() in C language
• fseek() vs rewind() in C
• What is return type of getchar(), fgetc() and getc() ?
• Read/Write Structure From/to a File in C
• C Program to print contents of file
• C program to delete a file
• C Program to merge contents of two files into a third file
• What is the difference between printf, sprintf and fprintf?
• Difference between getc(), getchar(), getch() and getche()

Miscellaneous

• time.h header file in C with Examples
• Input-output system calls in C | Create, Open, Close, Read, Write
• Signals in C language
• Program error signals
• Socket Programming in C
• _Generics Keyword in C
• Multithreading in C
• C Programming Interview Questions (2024)
• Commonly Asked C Programming Interview Questions | Set 1
• Commonly Asked C Programming Interview Questions | Set 2
• Commonly Asked C Programming Interview Questions | Set 3

In this  C Tutorial , you’ll learn all C programming basic to advanced concepts like variables, arrays, pointers, strings, loops, etc. This C Programming Tutorial is designed for both beginners as well as experienced professionals, who’re looking to learn and enhance their knowledge of the C programming language.

C is a general-purpose, procedural, high-level programming language used in the development of computer software and applications, system programming, games, and more.

• C language was developed by  Dennis M. Ritchie  at the Bell Telephone Laboratories in  1972 .
• It is a powerful and flexible language which was first developed for the programming of the  UNIX operating System .
• C is one of the most widely used programming languages.

C programming language  is known for its simplicity and efficiency. It is the best choice to start with programming as it gives you a foundational understanding of programming.

Getting Started With C Tutorial

Start your coding adventure with our free C Tutorial. A perfect C programming tutorial for beginners and advanced coders alike, this tutorial is your key to unlocking the magic of C programming. With clear explanations and fun examples.

Table of Content

C Control Statements Decision-Making

C arrays & strings, c error handling.

• Setting Up C Development Environment
• C Identifiers
• Different Ways to Declare Variable as Constant in C
• Scope Rules in C
• Data Type Modifiers in C
• Formatted and Unformatted Input and Output Functions
• Unary Operators in C
• Logical Operators in C
• size of Operator in C
• Decision-Making in C
• C if Statement
• C if…else Statement
• C if-else-if Ladder
• Using Range in switch case in C
• while looping in C
• do…while Loop in C
• for versus while Loop
• continue Statement in C
• break Statement in C
• Importance of Function Prototype in C
• Return Multiple Values From a Function
• Implicit Return Type int in C
• Nested Functions in C
• _Noreturn Function Specifier in C
• Maths Functions in C
• Initialization of Multidimensional Arrays in C
• Pass a 2D Array as a Parameter in C
• Data Types for Which Array is Not Possible
• Pass an Array by Value in C
• An Array of Strings in C
• Difference Between Single Quoted and Double Quoted Initialization
• String Functions in C
• Pointer Arithmetics in C
• Pointer to Pointer (Double Pointer) in C
• Declare Function Pointer in C
• Pointer to an Array in C
• Constant Pointer in C
• Dangling, Void, Null and Wild Pointers
• restrict Keyword in C
• Flexible Array Members in a Structure in C
• Initialization of Static Variables in C
• Static Functions in C
• Understanding “volatile” Qualifier in C
• Understanding the “register” Keyword in C
• Dynamic Memory Allocation in C
• Difference Between malloc() and calloc()
• What is a Memory Leak?
• Dynamically Allocate a 2D Array in C
• How a Preprocessor Works in C?
• Difference Between Header Files “stdio.h” and “stdlib.h”
• Write Your Own Header File in C
• Macros and their Types in C
• Interesting Facts About Macros and Preprocessors in C
• Print a Variable Name in C
• Multiline Macros in C
• Variable Length Arguments for Macros
• Branch Prediction Macros in GCC
• Difference Between #define and const in C
• C fopen() Function
• fgets() and gets() in C
• Return Type of getchar(), fgetc() and getc()
• C Program to Print Contents of File
• C Program to Delete a File
• C Program to Merge Contents of Two Files into a Third File
• Difference Between printf, sprintf and fprintf
• Difference Between getc(), getchar(), getch() and getche()
• Error Handling in C
• Using goto for Exception Handling in C
• Error Handling During File Operations in C
• C Program to Handle Divide By Zero and Multiple Exceptions
• Basic C Programs
• Control Flow Programs
• Pattern Printing Programs
• Functions Programs
• Arrays Programs
• Strings Programs
• Conversions Programs
• Pointers Programs
• Structures and Unions Programs
• File I/O Programs
• Date and Time Programs
• More C Programs
• Date and Time in C
• Input-output system calls in C
• Signals in C
• Program Error Signals in C

Top 50 C Programming Interview Questions and Answers Commonly Asked C Programming Interview Questions | Set 1 Commonly Asked C Programming Interview Questions | Set 2 Commonly Asked C Programming Interview Questions | Set 3

Why Learn C?

C programming language is one of the most popular programming language. It is a must learn for software engineering students. C is called the mother of all modern programming languages so learning C will help you to learn other languages easily like Java, C++, C#, Python, etc. C language is faster than other programming languages like Java and Python. It can handle low-level programming and we can compile the C code in a variety of computer platforms.

List of some  key advantages of C language :

• Easy to learn.
• Versatile Language, which can be used in both applications and technologies.
• Mid-Level Programming Language.
• Structured Programming Language.

C compiler is a software that translates human-readable C language code into machine code or an intermediate code that can be executed by a computer’s central processing unit (CPU).

There are many  C compilers  available in the market, such as  GNU Compiler Collection (GCC) ,  Microsoft Visual C++ Compiler ,  Clang ,  Intel C++ Compiler , and  TinyCC (TCC) .

For this tutorial, we will be using the GNU-based online C compiler provided by GeeksforGeeks which is developed for beginners and is very easy to use compared to other compiler/IDE’s available on the web.

Print Hello World using C Programming

“Give this C code a try, and here’s a fun challenge: print ‘Hello World’ along with your name!”

Features of C Language

There are some key features of C language that show the ability and power of C language:

• Simplicity and Efficiency:  The simple syntax and structured approach make the C language easy to learn.
• Fast Speed:  C is one of the fastest programming language because C is a static programming language, which is faster than dynamic languages like Java and Python. C is also a compiler-based which is the reason for faster code compilation and execution.
• Portable:  C provides the feature that you write code once and run it anywhere on any computer. It shows the machine-independent nature of the C language.
• Memory Management:  C provides lower level memory management using pointers and functions like realloc(), free(), etc.
• Pointers:  C comes with pointers. Through pointers, we can directly access or interact with the memory. We can initialize a pointer as an array, variables, etc.
• Structured Language:  C provides the features of structural programming that allows you to code into different parts using functions which can be stored as libraries for reusability.

Applications of C Language

C was used in programs that were used in making operating systems. C was known as a system development language because the code written in C runs as fast as the code written in assembly language.

The use of C is given below:

• Operating Systems
• Language Compilers
• Text Editors
• Print Spoolers
• Network Drivers
• Modern Programs
• Language Interpreters

FAQs on C Language

Q1. how to learn c easily.

The first steps towards learning C or any language are to write a hello world program. It gives the understanding of how to write and execute a code. After this, learn the following: Variables Operators Conditionals Loops and Errors Arrays and Strings  Pointers and Memory Functions Structures Recursions 

Q2. Difference between C and C++?

C	CPP
C is a procedural programming language.	C++ is both a procedural and object-oriented programming language.
It does not support Function overloading.	It supports function overloading.
Operator overloading is not supported.	Operator overloading is supported.
C does not support data hiding which leads to security concerns.	Data hiding is supported in C++ by Data Encapsulation.

 Q3. Is C easy to learn for beginners?

While C is one of the easy languages, it is still a good first language choice to start with because almost all programming languages are implemented in it. It means that once you learn C language, it’ll be easy to learn more languages like C++, Java, and C#.

Q4. Why should we learn C first rather than C++?

C is a ‘ mother of all languages .’ It provides a solid understanding of fundamental programming concepts and is considered easier to grasp. C offers versatile applications, from software development to game programming, making it an excellent choice for building a strong programming foundation.

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