what is the purpose of atexit function?

Question

I know when the address of the function is passed to atexit function,
the function is excuted.

#include 
int atexit(void (*fun         


        

Answer 1

Yes, atexit is related to exit.

exit can call functions which are automatically called before a program exits. These functions are called exit handlers and are registered by calling atexit function.

#include                 

main(void) {                        
atexit(func);
}

func(void) 
{
    ...
}