Header Files in C

Header Files in C — a practical guide to C header files with clear examples you can reuse in real projects.

C Programming Tutorial Series (83/102). Prefer one article? Read the complete C programming tutorial.

Short description

Put declarations in headers, definitions in .c files (except static inline).

Include guard

#ifndef POINT_H
#define POINT_H
typedef struct Point { int x, y; } Point;
#endif