//抢答器
//按下3个按钮分别点亮红黄绿3个灯，每个灯延时2秒。
int redled=10;
int yellowled=9;
int greenled=8;
int redpin=7;
int yellowpin=6;
int greenpin=5;
int red;
int yellow;
int green;
void setup()
{
pinMode(redled,OUTPUT);
pinMode(yellowled,OUTPUT);
pinMode(greenled,OUTPUT);
pinMode(redpin,INPUT);
pinMode(yellowpin,INPUT);
pinMode(greenpin,INPUT);
}
void loop()
{
red=digitalRead(redpin);
if(red==LOW)
{ digitalWrite(redled,LOW);}
else
{ digitalWrite(redled,HIGH);//点亮红灯
delay(2000); //延时2秒
}
yellow=digitalRead(yellowpin);
if(yellow==LOW)
{ digitalWrite(yellowled,LOW);}
else
{ digitalWrite(yellowled,HIGH); //点亮黄灯
delay(2000); //延时2秒
}
green=digitalRead(greenpin);
if(green==LOW)
{ digitalWrite(greenled,LOW);}
else
{ digitalWrite(greenled,HIGH); //点亮绿灯
delay(2000);//延时2秒
}
}