C Language Overview

The components of the above structure are: 

1. Header Files Inclusion: The first and foremost component is the inclusion of the Header files in a C program. 
   A header file is a file with extension .h which contains C function declarations and macro definitions to be shared between several source files.
   Some of C Header files: 
   • stddef.h – Defines several useful types and macros.
   • stdint.h – Defines exact width integer types.
   • stdio.h – Defines core input and output functions
   • stdlib.h – Defines numeric conversion functions, pseudo-random network generator, memory allocation