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const person1 = { name: "John" };
const person2 = { name: "Jane" };

function greet() {
  console.log(`Hello, ${this.name}!`);
}

// ʹÓà call ¸ü¸ÄÖ´ÐÐÉÏÏÂÎÄ
greet.call(person1); // Êä³ö£º"Hello, John!"
greet.call(person2); // Êä³ö£º"Hello, Jane!"

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function addNumbers(a, b) {
  return a + b;
}

// ʹÓà call ת´ïÌØÊâ²ÎÊý
const result = addNumbers.call(null, 1, 2, 3); // Êä³ö£º6

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const Parent = function (name) {
  this.name = name;
};

Parent.prototype.greet = function () {
  console.log(`Hello, ${this.name}!`);
};

const Child = function (name) {
  Parent.call(this, name); // ŲÓø¸Àà½á¹¹º¯Êý
};

// ¼ÌÐø¸¸ÀàÒªÁì
Child.prototype = Object.create(Parent.prototype);

const child = new Child("John");
child.greet(); // Êä³ö£º"Hello, John!"

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