代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
function Person(myName, myAge)
{
//let per=new Object();
//let this=per;
//this=stu;
this.name = myName; // stu.name = myName;
this.age = myAge; // stu.age = myAge;
this.say = function () { // stu.say = function () {}
console.log(this.name, this.age);
}
// return this;
}
function Student(myName, myAge, myScore)
{
//let stu=new Object();
//let this=stu;
Person.call(this,myName,myAge);
this.score=myScore;
this.study=function()
{
console.log("day day up");
}
//return this;
}
let stu=new Student("cyg",66,666);
// stu.name = "zs";
//stu.age = 18;
//stu.score = 99;
//console.log(stu.score);
stu.say();
stu.study();
</script>
</body>
</html>
