function Student(id,name){
this.id = id;
this.name = name;
this.scores= [
    {subject:"html",scpres:"90"},
    {subject:"JS",scpres:"90"},
]
}
Student.prototype.sex = "男";
Student.prototype.eat = function(food){
    console.log("吃"+food)
}

var stu = new Student(1000,"张三");
stu.eat("米饭");
console.log(stu.sex);


var stu = new student(1000,"张三");