1类Vehicle，具有seats属性和drive方法
class Vehicle{
constructor(seats){ this.seats=seats;}
driver(){
console.log("i am driving");
}
}
kk = new Vehicle('ii');
console.log(kk.seats);
kk.driver();
或者：
class Vehicle{
constructor(seats,driver){
this.seats=seats;
this.driver = driver;
}
}
kk = new Vehicle('ii',function() {
console.log("iuiuiui");})
console.log(kk.seats);
kk.driver();
答案
ii
i am driving
其中第一种实现方法可以实现在类中定义方法，对象直接调用即可实现功能；第二种方法可以实现对象可以自己定义方法里面要实现的功能
2类Bus继承Vehicle，扩展了stops属性和charge方法`
class Bus extends Vehicle {
constructor(stop) {
super();
this.stop = stop;
}
charge() {
console.log("i will receive you really high")
}
}
3. 把上述类的写法⽤用构造函数的写法再实现一次
重写问题1的代码如下：
function Vehicle(seats) {
this.seats = seats;
this.driver = function (way) {
console.log(way);
}
}
vihi = new Vehicle(9);
console.log(vihi.seats)
vihi.driver("riding");
重写问题2的代码如下：
function Bus(stops){
this.stops = stops;
this.charge = function(money){
console.log("give me"+ ' '+money);
}
}
Bus.prototype = {
drive : function (way) {
console.log(way);
},
seats:"oo"
}
bus = new Bus("right now");
console.log(bus.stops);
bus.charge("50$");
console.log(bus.seats);
bus.drive("riding");
答案为：
right now
give me 50$
oo
riding
