Defined in header <string.h>

Defined in header <threads.h>

Every C program contains the definition (not the prototype) of a function called main, which is the designated start of the program.

Defined in header <math.h>

A function definition associates the function body (a sequence of declarations and statements) with the function name and parameter list. Unlike

Functions Defined in header <stdlib.h>

Defined in header <complex.h>

Defined in header <math.h>

Defined in header <float.h>

Defined in header <wctype.h>