程式
#include<reg51.h>
sbit LED = P0^0;
sbit k1 = P2^0;
unsigned char mode,k1_s;
void delay(unsigned int x)
{
while(x--);
}
void key()
{
if(k1 == 0)
{
delay(50);
if(k1 == 0)
{
k1_s = 1;
}
}
if((k1 == 1)&&(k1_s == 1))
{
k1_s = 0;
mode++;
if(mode >= 2)mode = 0;
}
}
void mode_s()
{
if(mode == 0)
{
LED = 1;
}
if(mode_s == 1)
{
LED = 0;
}
}
void main()
{
while(1)
{
key();
mode_s();
}
}
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