构造函数创建对象

//构造函数创建对象

function student(name,age){
  this.name = name;
  this.age = age;
}
function dog(name,age){
  this.name = name;
  this.age = age;
}
var stud1 = new student("狗蛋",18);
var dog1 = new dog("tom",1);
console.log("我叫"+stud1.name+"今年"+stud1.age+"岁了，平时很调皮，我朋友说我很狗，但是我不是真的狗")
console.log("我叫"+dog1.name+"今年"+dog1.age+"岁了，我是真的狗")
console.log(stud1 instanceof student);//学生是学生类，狗是狗类，但他们都是object类
console.log(dog1 instanceof dog);
console.log(stud1 instanceof dog);
console.log(dog1 instanceof student);
console.log(stud1 instanceof Object);
console.log(dog1 instanceof Object);