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老师批语：你的案例不错, 很形象
构造函数，说通俗一点就是建立一个大商场，有摊位卖商品，其他人可以进商场在这个摊位上卖，也可以自己摆摊卖，还可以自己摆摊拿其他摊位上的商品卖！卖的商品就是属性，摊位就是函数
代码实例如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>构造函数</title>
</head>
<body>
<script>
var CreatObj = function () {
this.itemnumber = 8;
this.price = 20 ;
this.money = function (itemnumber,price) {
return itemnumber * price ;
};
};
var obj1 = new CreatObj();
console.log(obj1.itemnumber);
console.log(obj1.price);
console.log(obj1.money(obj1.itemnumber , obj1.price));
CreatObj.prototype.price2 = 50 ;
CreatObj.prototype.money2 = function (itemnuber,price2) {
return itemnuber*price2 ;
};
var obj2 = new CreatObj();
console.log(obj2.price);
console.log(obj2.price2);
console.log(obj2.itemnumber);
console.log(obj2.money(obj2.itemnumber , obj2.price));
console.log(obj2.money(obj2.itemnumber , obj2.price2));
console.log(obj2.money2(obj2.itemnumber , obj2.price));
console.log(obj2.money2(obj2.itemnumber , obj2.price2));
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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