2-4.c

C51.rar

#include <reg51.h>
#include <stdio.h>
void main()
{
char a,b;
a='x';
b='y';
a=a-32;
b=b-32;
SCON = 0x50; 
TMOD |= 0x20; 
TH1 = 0xf3; 
TR1 = 1;
TI = 1;
printf("%c,%c\n%d,%d\n",a,b,a,b);
}