C++ day5

#include <iostream>

using namespace std;

class RMB
{
private:
    int yuan;
    int jiao;
    int fen;
    static int count;
public:
    // 无参构造函数
    RMB()
    {
        count++;
    }

    // 有参构造函数
    RMB(int yuan, int jiao, int fen):yuan(yuan), jiao(jiao), fen(fen)
    {
        count++;
    }

    // 拷贝构造函数
    RMB(const RMB &other):yuan(other.yuan), jiao(other.jiao), fen(other.fen)
    {
        count++;
    }

    // 析构函数
    ~RMB()
    {
        count--;
    }

    // 静态成员函数
    static int existCount()
    {
        return count;
    }

    RMB operator+(const RMB &R)
    {
        RMB temp;
        temp.yuan = yuan + R.yuan;
        temp.jiao = jiao + R.jiao;
        temp.fen = fen + R.fen;
        return temp;
    }

    RMB operator-(const RMB &R)
    {
        RMB temp;
        temp.yuan = yuan - R.yuan;
        temp.jiao = jiao - R.jiao;
        temp.fen = fen - R.fen;
        return temp;
    }

    RMB &operator--()
    {
        --yuan;
        --jiao;
        --fen;
        return *this;
    }

    RMB operator--(int)
    {
        RMB temp;
        temp.yuan = yuan--;
        temp.jiao = jiao--;
        temp.fen = fen--;
        return temp;
    }

    bool operator>(const RMB &other)
    {
        return yuan*100+jiao*10+fen > other.yuan*100+other.jiao*10+other.fen;
    }

    void show()
    {
        cout << "yuan " << yuan << endl;
        cout << "jiao " << jiao << endl;
        cout << "fen " << fen << endl;
    }
};

// 静态变量初始化
int RMB::count;

int main()
{
    // 测试数据
    RMB r1(200, 2, 2);
    RMB r2(100, 1, 1);

    cout << "=====\"+\"重载测试=====" << endl;
    RMB r3 = r1 + r2;
    r3.show();

    cout << "=====\"-\"重载测试=====" << endl;
    r3 = r1 - r2;
    r3.show();

    cout << "=====\"前置--\"重载测试=====" << endl;
    RMB r4 = --r3;
    r4.show();
    r3.show();

    cout << "=====\"后置--\"重载测试=====" << endl;
    r4 = r3--;
    r4.show();
    r3.show();

    cout << "=====\">\"重载测试=====" << endl;
    if(r1 > r2)
    {
        cout << "true" << endl;
    }
    else
    {
        cout << "false" << endl;
    }

    cout<< "===静态成员变量功能测试===" << endl;
    cout << "现存RMB对象: "   << RMB::existCount() << endl;
    RMB* r5 = new RMB(300, 3, 3);
    cout << "现存RMB对象: "   << RMB::existCount() << endl;
    delete r5;
    cout << "现存RMB对象: "   << RMB::existCount() << endl;
    return 0;
}