C example programs

Ten standalone, compilable .c files — each with its own main() and comments throughout in English. Download them, compile with gcc, and run them yourself.

• 01Basics & I/O

  01_basics_and_io.c

  Variables, built-in types, sizeof, and reading/writing with printf and scanf.

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• 02Operators & Control Flow

  02_operators_and_control_flow.c

  Arithmetic and logical operators, precedence, if/switch, and the ternary operator.

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• 03Loops

  03_loops.c

  while, do-while, for, break/continue — with a prime checker, Fibonacci, and digit sum.

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• 04Functions

  04_functions.c

  Prototypes, pass-by-value, and recursion (factorial, GCD, Fibonacci).

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• 05Arrays

  05_arrays.c

  1D/2D arrays, linear and binary search, and bubble sort.

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• 06Strings

  06_strings.c

  Hand-written strlen/strcpy, <string.h>, palindrome check, and case conversion.

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• 07Pointers

  07_pointers.c

  Address-of/dereference, swapping through pointers, pointer arithmetic, and function pointers.

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• 08Dynamic Memory

  08_dynamic_memory.c

  malloc, calloc, realloc, free — and a small growable array built on top of them.

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• 09Structs & Linked List

  09_structs_and_linked_list.c

  Structs, an array of structs, a union, and a full singly linked list.

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• 10File I/O & Preprocessor

  10_file_io_and_preprocessor.c

  Writing/reading files with FILE*, a word-count example, and macros with #ifdef.

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