C库函数 - atexit()

#include <stdio.h>

#include <stdlib.h>



void functionA () {

   printf("This is functionA\n");

}



int main () {

   /* register the termination function */

   atexit(functionA );



   printf("Starting  main program...\n");



   printf("Exiting main program...\n");



   return(0);

}