C++重载的相关问题

一、完成复数类CComplex的定义，(包括real和image两个double型数据成员)
●包括构造函数，print()打印数据成员值的成员函数.
● 并用成员函数重载 ‘=’赋值运算符和前、后‘++’运算符，用友元函数重载双目‘+’和‘-’运算符.
二、在主函数中分别进行以下测试 ：
●对象=对象+对象；
●对象=对象-对象；
●++对象；
并分别调用print函数打印对象数据成员值

代码如下：

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
class CComplex
{
private:
    double real, image;
public:
    CComplex(double r = 0, double i = 0) { real = r; image = i; }
    ~CComplex() {}
    

    //友元函数+
    friend CComplex& operator +(CComplex& c1, CComplex& c2)
    {
        CComplex t;
        t.real = c1.real + c2.real;
        t.image= c1.image + c2.image;
        return t;
    }
    friend CComplex& operator -(CComplex& c1, CComplex& c2)
    {
        CComplex t;
        t.real = c1.real - c2.real;
        t.image = c1.image - c2.image;
        return t;
    }

    //成员函数=
    CComplex& operator =(CComplex& c)
    {
        CComplex t;
        t.real = c.image;
        t.image = c.image;
    }

    //前置++
    CComplex operator ++() {
        this->real += 1;
        this->image += 1;
        return *this;
    }
    //后置++
    CComplex operator ++(int) {

        CComplex c(this->real, this->image);
        this->real += 1;
        this->image += 1;
        return c;
    }
    //前置--
    CComplex operator --() {
        this->real -= 1;
        this->image -= 1;
        return *this;
    }
    //后置--
    CComplex operator --(int) {

        CComplex c(this->real, this->image);
        this->real -= 1;
        this->image -= 1;
        return c;
    }

    void print()
    {
        if (image > 0)
            cout << real << "+" << image << "i";
        else if (image == 0)
            cout << real;
        else
            cout << real << image << "i";
    }

};




int main()
{
    CComplex a(3, 5), b(5, 3);
    cout << "a: ";
    a.print();
    cout << endl << "b: ";
    b.print();
    cout << endl << "a+b= ";
    CComplex c = a + b;
    c.print();
    cout << endl << "a-b= ";
    CComplex d = a - b;
    d.print();

    cout << endl << "++a : ";
    ++a;
    a.print();


    
    return 0;
}

#include<iostream>
using namespace std;
class CComplex
{
public:
    //CComplex() CComplex(20) CComplex(30,30)
    CComplex(int r = 0, int i = 0)//构造
        :mreal(r), mimage(i) {}
    CComplex operator=(CComplex &c2)
    {
        CComplex tmp;
        tmp.mreal = c2.mreal ;
        tmp.mimage = c2.mimage ;
        return tmp;
    }
    //加法运算符重载
    friend CComplex operator+(CComplex c1,CComplex c2)
    {
        return CComplex(c1.mreal+c2.mreal,c1.mimage+c2.mimage);
    }
    friend CComplex operator-(CComplex c1,CComplex c2)
    {
        return CComplex(c1.mreal-c2.mreal,c1.mimage-c2.mimage);
    }
    CComplex operator++(int)//后置++重载
    {

        return CComplex(mreal++, mimage++);
    }
    CComplex& operator++()//前置++重载
    {
        mreal += 1;
        mimage += 1;
        return *this;//返回加完后的值
    }
    void show()
    {
        cout << "real:" << mreal << " image:" << mimage << endl;
    }
private:
    double mreal;//实部
    double mimage;//虚部
};

int main()
{
    CComplex comp1(20, 20);
    CComplex comp2(10, 10);

    CComplex comp3 = comp1 + comp2;
    comp3.show();
    CComplex comp4 = comp1 - comp2;
    comp4.show();
    comp4++;
    comp4.show();
    return 0;
}

• 可以查看手册：c++-运算符重载 中的内容

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