Js中加法运算重载的用法

加法运算重载

调用对象自身成员变量发送改变 标签： <无>
代码片段

#pragma once
class Complex
{
public:
    Complex(void);
    ~Complex(void);
    Complex(int real,int imag);
    int get_real()const;
    int get_imag()const;
    void Display()const;

    void Addone(const Complex& other);
    Complex operator+(const Complex& other);

private:
    int real_;
    int imag_;
};
Complex::Complex(void) {}
Complex:: Complex(int real,int imag):real_(real),imag_(imag) {}

int Complex:: get_real()const
{   return real_;
}

int Complex:: get_imag ()const
{   return imag_;
}

void Complex::Display()const
{   cout<<real_<<','<<imag_<<endl;
};

void Complex::Addone(const Complex& other)
{   real_+=other.get_real();
    imag_+=other.get_imag();

}
Complex Complex::operator+(const Complex& other)//调用对象自身的值发生了改变
{   real_+=other.get_real();
    imag_+=other.get_imag();
    return *this;
}

Complex::~Complex(void)
{
}
#include<iostream>
#include "Complex.h"
using namespace std;

Complex Add( Complex& A, Complex& B)
{   return Complex(A.get_real()+B.get_real(),A.get_imag()+B.get_imag());
};

void main()
{   Complex a(10,5);
    Complex b(11,0);
    Complex c;

    a.Display();
    b.Display();

    c = Add(a,b);
    c.Display();

    c.Addone(a);
    c.Display();

    a+b; //与a的类成员函数调用a.operator+(b)等价
 a.Display();
}

运算符重载返回新的对象

代码片段

#pragma once
class Complex
{
public:
    Complex(void);
    ~Complex(void);
    Complex(int real,int imag);
    int get_real()const;
    int get_imag()const;
    void Display()const;

    void Addone(const Complex& other);
    Complex operator+(const Complex& other);

private:
    int real_;
    int imag_;
};
#include "Complex.h"

#include<iostream>
using namespace std;

Complex::Complex(void) {}
Complex:: Complex(int real,int imag):real_(real),imag_(imag) {}

int Complex:: get_real()const
{   return real_;
}

int Complex:: get_imag ()const
{   return imag_;
}

void Complex::Display()const
{   cout<<real_<<','<<imag_<<endl;
};

void Complex::Addone(const Complex& other)
{   real_+=other.get_real();
    imag_+=other.get_imag();

}
//Complex Complex::operator+(const Complex& other)//调用对象自身的值发生了改变
//{   real_+=other.get_real();
//    imag_+=other.get_imag();
//    return *this;
/