#include<reg52.h>

unsigned int i=0;
unsigned char tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
sbit P1_3=P1^3;
sbit P1_4=P1^4;
sbit P1_5=P1^5;
sbit P1_6=P1^6;

void delay(unsigned int N)
{
while(N)N--;
}

fun()  interrupt 2 //using 3
{
if(i<10)
{
P1_3=1;
P1_4=0;
P1_5=0;
P1_6=0;
P0=tab[i];
delay(5000);
i++;
}
if(i>=10&&i<=15)
{
P1_3=0;
P1_4=1;
P1_5=0;
P1_6=0;
P0=tab[i];
delay(5000);
i++;
}
if(i<0||i>15)
i=0;
}

main()
{
EA=1;
EX1=1;
IT1=1;

while(1);         //等待
}