7-2编程练习

来源：7-2 编程练习

慕粉1110144175

2019-03-14 16:22:46

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <script>  
        //补充代码
        function animal(name,food){
            this.name=name;
            this.food=food;
            this.say=function(){
                alert(this.name+'喜欢吃'+this.food);
            }
        };
        function dog(name,food){
            animal.call(this,name,food);
        }
        var d=new dog('狗狗','骨头');
        d.say();
    </script> 
</body>
</html>

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