int BOOS = 3;
int supervisor = 4;
int back_operator = 5;
int front_operator = 6;

int state_Boss = 0;
int state_supervisor = 0;
int state_back_operator = 0;
int state_front_operator = 0;

int LED = 8; //

void setup() {
  pinMode(BOOS, INPUT_PULLUP);
  pinMode(supervisor, INPUT_PULLUP);
  pinMode(back_operator, INPUT_PULLUP);
  pinMode(front_operator, INPUT_PULLUP);

  //Serial.begin(9600);
  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);
}

void loop()
{
  // read pushbuttons' states
  state_Boss = digitalRead(BOOS);
  state_supervisor = digitalRead(supervisor);
  state_back_operator = digitalRead(back_operator);
  state_front_operator = digitalRead(front_operator);
  //Serial.print(state_Boss);

  if ( (state_supervisor == HIGH && (state_back_operator == LOW || state_front_operator == LOW)) || state_Boss == LOW)    //In pullup mode, the inital state of pushbutton was HIGH, so detect low voltage.
  {
    digitalWrite(LED, HIGH);
    //state_Boss = 0; 
  }
  else 
  {
    digitalWrite(LED, LOW);
  }

  delay(50);
}

/* debounce
int keyGetNum(int key) {
  if (digitalRead(key) == LOW) { // 检测按键按下
    delay(20);                   // 消抖延时
    while (digitalRead(key) == LOW); // 等待按键释放
    delay(20);                   // 再次消抖
    return 0;                    // 按键按下返回 0
  }
  return 1;                      // 按键未按下返回 1
}
*/