C图形编程4

 /*********************************/
/*      int86() program          */
/*      author:xwlee             */
/*      time: 06/11/3            */
/*********************************/
#include "stdio.h"
#include "dos.h"

#define Key_ESC  1
#define Key_A    30

int getkeyscode();

int main()
{
    int acount=0,ky;

    do
    {
        ky=getkeyscode();
        switch(ky)
        {
            case Key_A:  ++acount; break;
            case Key_ESC:
                         printf("/nEnd the program");
                         exit(0);
            default:
                         break;
         }
         printf("/nDuring the program,you press A/a %d times",acount);
      }while(1);

   getch();

   return 0;
}

int getkeyscode()
{
    union REGS rg;
    rg.h.ah=0;
    int86(0X16,&rg,&rg);
    return rg.h.ah;
}