#include<reg51.h>
sbit Led = P1^0;
sbit Switch = P1^2; 
main()
{
	Led = 0;
	Switch = 1;
while(1) 
	{
		if(Switch == 0) 
		{
			Led = 0; 
		}
		else
		{
			Led = 1; 
		}
	}
}