var Games = function () {}

Games.prototype.initialize = function () {}; // 抽象方法，需要子类重写
Games.prototype.startPlay = function () {}; // 抽象方法，需要子类重写
Games.prototype.endPlay = function () {}; // 抽象方法，需要子类重写

Games.prototype.play = function () {
  this.initialize(); // 初始化游戏
  this.startPlay(); // 开始游戏
  this.endPlay(); // 结束游戏
};

// 篮球游戏类
var BasketBall = function () {};
BasketBall.prototype = new Games();

BasketBall.prototype.initialize = function () {
  console.log("BasketBall Game Initialized! Start playing.");
};

BasketBall.prototype.startPlay = function () {
  console.log("BasketBall Game Started. Enjoy the game!");
};

BasketBall.prototype.endPlay = function () {
  console.log("BasketBall Game Finished!");
};

// 足球游戏类
var Football = function () {};
Football.prototype = new Games();

Football.prototype.initialize = function () {
  console.log("Football Game Initialized! Start playing.");
};

Football.prototype.startPlay = function () {
  console.log("Football Game Started. Enjoy the game!");
};

Football.prototype.endPlay = function () {
  console.log("Football Game Finished!");
};

var b = new BasketBall();
b.play();