使用JavaScript原型调用方法

function Person(name, age) {
  this.name = name;
  this.age = age;
}

Person.prototype.sayHello = function() {
  console.log('Hello, my name is ' + this.name + ' and I am ' + this.age + ' years old.');
}

var person1 = new Person('Alice', 30);
var person2 = new Person('Bob', 25);

person1.sayHello(); // 输出 "Hello, my name is Alice and I am 30 years old."
person2.sayHello(); // 输出 "Hello, my name is Bob and I am 25 years old."