#include <reg52.h>
sbit ADDR0=P1^0;
sbit ADDR1=P1^1;
sbit ADDR2=P1^2;
sbit ADDR3=P1^3;
sbit ENLED=P1^4;
void youzuo();
void zuoyou();
unsigned char a[]={0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F};
unsigned char *p=&a;
unsigned char b=0;
unsigned int i=0;
unsigned char c=0;
unsigned char d=0;
void main()
{
ENLED=0;
ADDR3=1;
ADDR2=1;
ADDR1=1;
ADDR0=0;
while(1)
{
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