头歌实训项目【静态成员 —— 模拟共享书店】

#include <string>
#include <iostream>
using namespace std;

class User
{
	//成员声明
public:
	string Name;
	int Books;
	User(string name, int books);
	~User();
	static void GetState();
private:
	static int UserCount;
	static int BookCount;

};
int User::UserCount = 0;
int User::BookCount = 0;
//成员函数声明
User::User(string name, int books)
{
	Name = name;
	Books = books;
	cout << Name << " " << Books << " " << "进入" << endl;
	UserCount++;
	BookCount += books;
}

User::~User()
{
	UserCount--;
	BookCount -= Books;
	cout << Name << " " << Books << " " << "离开" << endl;
}
void User::GetState()
{
	cout << "书店人数:" << UserCount << "，书店共享书数量:" << BookCount << "，人均共享数量:" << BookCount / UserCount << endl;
}


int main()
{
	string name1, name2, name3;
	int a, b, c;
	cin >> name1 >> a >> name2 >> b >> name3 >> c;
	User* u1 = new User(name1, a);
	User* u2 = new User(name2, b);
	User::GetState();
	delete u1;
	u1 = new User(name3, c);
	User::GetState();
	delete u2;
	User::GetState();
	delete u1;
	User::GetState();
}