C Source Code Examples

This page contains 100+ C programming source code examples. All the C programming source code examples are up to date and are well-tested in our development environment.

We covered source code examples on various C programming language standard libraries:

• <stdio.h>: Standard Input and Output library
• <stdlib.h>: Standard Library
• <string.h>: String Operations library
• <math.h>: Mathematics library
• <time.h>: Time library
• <ctype.h>: Character Type library
• <errno.h>: Error Number library
• <assert.h>: Assertion library
• <limits.h>: Sizes of Basic Types library
• <setjmp.h>: Jump library
• <signal.h>: Signals library

C Programming Examples

1. What is an Algorithm with Examples
2. What is a Flowchart with Examples
3. Differences between Algorithm and Flowchart
4. Structure of C Program with Example
5. C printf and scanf Examples

Standard Input/Output Library Functions

1. scanf() in C - Source Code Example
2. printf() in C - Source Code Example
3. sprintf() in C - Source Code Example
4. sscanf() in C - Source Code Example
5. fopen() in C - Source Code Example
6. fclose() in C - Source Code Example
7. fwrite() in C - Source Code Example
8. fread() in C - Source Code Example
9. fgets() in C - Source Code Example
10. fputs() in C - Source Code Example
11. getchar() in C - Source Code Example
12. putchar() in C - Source Code Example

String Operations Library Functions

1. strcpy() in C - Source Code Example
2. strncpy() in C - Source Code Example
3. strncpy() in C - Source Code Example
4. strcat() in C - Source Code Example
5. strncat() in C - Source Code Example
6. strlen() in C - Source Code Example
7. strcmp() in C - Source Code Example
8. strncmp() in C - Source Code Example
9. strchr() in C - Source Code Example
10. strrchr() in C - Source Code Example
11. strstr() in C - Source Code Example
12. strdup() in C - Source Code Example
13. strcoll() in C - Source Code Example

General Utilities Library Functions

1. malloc() in C - Source Code Example
2. calloc() in C - Source Code Example
3. free() in C - Source Code Example
4. realloc() in C - Source Code Example
5. atoi() in C - Source Code Example
6. atol() in C - Source Code Example
7. atof() in C - Source Code Example
8. rand() in C - Source Code Example
9. system() in C - Source Code Example
10. srand() in C - Source Code Example
11. exit() in C - Source Code Example
12. abs() in C - Source Code Example
13. qsort() in C - Source Code Example
14. div() in C - Source Code Example

Mathematical Library Functions

1. sin() Function Example in C Programming
2. cos() Function Example in C Programming
3. tan() Function Example in C Programming
4. asin() Function Example in C Programming
5. acos() Function Example in C Programming
6. atan() Function Example in C Programming
7. atan2() Function Example in C Programming
8. sinh() Function Example in C Programming
9. cosh() Function Example in C Programming
10. tanh() Function Example in C Programming
11. exp() Function Example in C Programming
12. log() Function Example in C Programming
13. log10() Function Example in C Programming
14. pow() Function Example in C Programming
15. sqrt() Function Example in C Programming
16. ceil() Function Example in C Programming
17. floor() Function Example in C Programming
18. fabs() Function Example in C Programming

Character Library Functions

1. isalnum() Function Example in C Programming
2. isalpha() Function Example in C Programming
3. isblank() Function Example in C Programming
4. iscntrl() Function Example in C Programming
5. isdigit() Function Example in C Programming
6. isgraph() Function Example in C Programming
7. islower() Function Example in C Programming
8. isprint() Function Example in C Programming
9. ispunct() Function Example in C Programming
10. isspace() Function Example in C Programming
11. isupper() Function Example in C Programming
12. isxdigit() Function Example in C Programming
13. tolower() Function Example in C Programming
14. toupper() Function Example in C Programming

Time and Date Library Functions

1. time() Function Example in C Programming
2. ctime() Function Example in C Programming
3. strftime() Function Example in C Programming
4. mktime() Function Example in C Programming
5. difftime() Function Example in C Programming
6. clock() Function Example in C Programming
7. localtime() Function Example in C Programming
8. gmtime() Function Example in C Programming
9. asctime() Function Example in C Programming

Signal Handling Library Functions

1. signal() Function Example in C Programming
2. raise() Function Example in C Programming

Non-local Jumps Library Functions

1. longjmp() Function Example in C Programming
2. setjmp() Function Example in C Programming

Assertion Library Functions

1. assert() Function Example in C Programming