#include<reg52.h>
#define uint unsigned int
sbit k1=P3^2;
sbit D1=0xfe;
void delay(unsigned int)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void key()
{
if(k1==0)
{
deley(5);
if(k1==0)
{
D1=0;
delay(5000);
D1=1;
}
}
}
void main()
{
key();
}
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