#include <reg52.h>

sbit K1 = P3^2;
sbit led1 = P0^5;
sbit led2 = P0^6;
typedef unsigned int u16;
unsigned char x;

void delay_10us(u16 n)
{
	while(n--);
}

void main(){
IT0 = 1;
EX0 = 1;
EA = 1;
while (1);
}

void exit0()interrupt 0{
	delay_10us(100);
	if (K1 == 0)
	led1 = ~led1;
}