#include <stdio.h>
#include <reg51.h>
void main()
{

long x,y;
int a,b,c,d;
x=5;
y=6;
a=7;
b=8;
c=x+a;
d=y+b;

SCON = 0x50; 
TMOD |= 0x20; 
TH1 = 0xf3; 
TR1 = 1;
TI = 1; 

printf("c=x+a=%d,d=y+b=%d\n",c,d);
}