指针成员和聚合关系-创新互联

1.聚合关系的特征："成员对象"可以独立于“聚合对象”而存在

2.c++中用“类(or对象)的指针”实现这个 聚合关系

#include#include#includeusing namespace std;

class Coach
{
	//定义一个教练类
public:
	string name;
public:
	Coach() {
		this->name = "无名氏" ;//默认构造函数
	};
	Coach(string name_) :name(name_) {}; //1个参数构造函数

};

class Player
{
	//定义一个球员类
public:	string name;
public:
	Player() {
		this->name = "某球员";
	}; //默认构造函数
	Player(string name_) :name(name_) {}; //一个参数的构造函数
};

//定义一个聚合类：team
class Team
{
private:
	Coach* choach_p;
	vectorplayers;
	string name;
public:
	Team(Coach* c,string name_):name(name_)
	{
		choach_p = c; //指向那个 对象指针
	} //构造函数
	//分别：招募球员，更换教练，开出球员3个函数
	void changeCoach(Coach* c)
	{
		cout<< "最新消息："<< "教练 "<< this->choach_p->name<< " 更换为 "<< c->name<< endl;
		choach_p = c; //更换教练
	}
	void employPlayer(Player *p)
	{
		players.push_back(p);
		cout<< "成功招募 球员 "<< p->name<< endl; //招募新球员
	}
	void firePlayer(Player* p)
	{
		//开出球员
		//遍历vector寻找
		for (auto it = players.begin(); it != players.end(); it++)
		{
			if (*it == p)
			{
				cout<< "很遗憾，球员"<< p->name<< " 被宣布开除！！！"<< endl;
				players.erase(it);  //删除对应球员的迭代器（erase里面的参数就是对应的迭代器）
				cout<< this->name<<" 剩余"<< players.size()<< "个 球员"<< endl;
				break;
			}
		}
	}

};

int main()
{
	//测试:
	Coach* c = new Coach("张三");
	Coach* c2 = new Coach("李四");
	//cout<< c->name<< endl;
	Player* p1 = new Player("球员1号");
	Player* p2 = new Player("球员2号");
	Team t1(c, "中大篮球队");
	t1.employPlayer(p1);
	t1.employPlayer(p2);
	t1.firePlayer(p1);

	t1.changeCoach(c2);

	return 0;
}

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