C Programming Code Examples C > Beginners Lab Assignments Code Examples atexit: causes the function pointed to by func to be called upon normal program termination atexit: causes the function pointed to by func to be called upon normal program termination //Declaration: int atexit(void (*func)(void)); //Return: returns zero if the function is successfully registered as a termination function and nonzero otherwise. #include <stdlib.h> #include <stdio.h> void done(void); int main(void) { if(atexit(done)){ printf("Error in atexit()."); } return 0; } void done(void) { printf("c.happycodings.com"); } /* c.happycodings.com/