【1】面向对象点灯

 首先创建一个类  class, 类里面的内容叫做封装

#include <Arduino.h>

class Led
{ // 创建一个类
public:
  byte pin;
  void on();
  void off();
  void toggle();
};

Led ledGreen, ledYellow, ledRed; // 创建对象

void Led::on(){ //开
  digitalWrite(pin, HIGH);
}

void Led::off(){  //关
  digitalWrite(pin, LOW);
}

void Led::toggle(){
  digitalWrite(pin, !digitalRead(pin));
}

void setup() {
  Serial.begin(115200);
  ledGreen.pin = 33;  //设置LED引脚
  pinMode(33,OUTPUT);
  ledGreen.on(); delay(1000);
  ledGreen.off();delay(1000);

}

void loop(){

  ledGreen.toggle();
  delay(1000);
}