h0702.c

学习C语言必备的好书

#include <stdlib.h>
#include <conio.h>
#include <stdio.h>

int main(void)
{
   int status;

   printf("Enter either 1 or 2\n");
   status = getch();
   /* Sets DOS errorlevel  */
   exit(status - '0'); 

/* Note: this line is never reached */
   return 0;
}