/*************** writer:shopping.w ******************/
#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
void Delay(uint x)
{
uchar i;
while(x--)
{
for(i=0;i<120;i++);
}
}
void main()
{
P2 = 0x00;
while(1)
{
P2 = (P2+1)%8;
Delay(50);
}
}
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