C/stdlib.h/Exit 2

_Exit: exit program without closing files

<source lang="cpp">

//Declaration: void _Exit(int exit_code);

 #include <stdlib.h>
 #include <stdio.h>
 int main(void)
 {
   char choice;
   do {
     printf("Quit (Q)\n");
     choice = getchar();
   } while(!strchr("Q", toupper(choice)));
   if(choice=="Q"){
      _Exit(0);
   }
   return choice;
 }
          
      </source>