atexit() in C

C function : atexit()

"atexit causes the defined function  to be called when the program terminates. You can register your termination function anywhere you like, but it will be called at the time of program termination."

Header File: stdlib.h (C) or cstdlib (C++)

ANSI: C and C++

Syntax:-

fun: is the function to be called at the termination of the program.

A non zero is returned if it fails and a zero is returned if it was successful.

program:-

output:-