Header files are files in C and C++ that typically contain declarations of functions, classes, variables, and constants. They serve as an interface between different parts of a program, allowing code to be organized and reused efficiently.
Header files usually have a .h or .hpp extension and are included in source files using the #include directive. By including a header file, you can access the declarations and definitions it contains without having to rewrite them in every source file.
For example, a header file might declare a function like this:
// my_functions.h
void myFunction();Then, in your source file, you can include this header to use myFunction:
#include "my_functions.h"This promotes modularity and helps in managing larger codebases.
