#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit OUT1=P1^0;
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit wb=P3^2;
uchar num;
uchar t;
void delay(int z)
{
int x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void keyscan()
{
if(key1==0)
{
delay(5);
if(key1==0);
{
t=1;
while(!key1);
}
}
if(key2==0)
{
delay(5);
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