int led_pin = 22;
int button_pin = 32;

//定义LED逻辑值
int led_logic =0;
//判断LED的状态是否改变过
bool status = false;

void setup() { //void setup就是初始化做定义的
  pinMode(led_pin, OUTPUT);
  pinMode(button_pin, INPUT_PULLDOWN);
}

void loop() {
  //按键消抖
  if (digitalRead(button_pin)){
    //睡眠10ms，如果依然是高电平，说明按下抖动消失了。
    delay(10);
    if(digitalRead(button_pin) && !status){
      led_logic = !led_logic;
      digitalWrite(led_pin,led_logic);

      //led的状态发生了变化，即使我持续按着安检，led的状态也不会发生改变
      status = !status;
    }else if(!digitalRead(button_pin)){
      status = false;
    }
  
  }

}