运算符重载(使用binaray友元函数)类没有成员,成员不可访问

时间:2018-05-04 23:46:01

标签: c++ function overloading operator-keyword friend

在执行有关运算符重载的youtube教程时,我无法修复运算符重载(使用友元函数)错误消息。收到的消息是关于,类Complex没有成员"运营商+"和班级 "复::真实"在第7行宣布无法进入。

//链接到我挣扎的教程 https://www.youtube.com/watch?v=AlCYu_mc-T8

//错误信息从这里开始://

#include "stdafx.h"
#include <iostream>
using namespace std;

class Complex
{
    int real, imag;
public:
    void read();
    void show();
    friend Complex operator+ (Complex , Complex); // Friend function declaration
};

void Complex::read()
{
    cout << "Enter real value: ";
    cin >> real;
    cout << "Enter imaginary value: ";
    cin >> imag;
}

void Complex::show()
{
    cout << real;
    if (imag < 0)
        cout << "-i";
    else
        cout << "+i";
    cout << abs(imag) << endl;
}

Complex Complex::operator+(Complex c1, Complex c2)
{
    Complex temp;
    temp.real = c1.real + c2.real;
    temp.imag = c1.imag + c2.imag;
    return temp;
}

int main()
{
    Complex c1, c2, c3;
    c1.read();
    c2.read();
    c3 = c1 + c2; // invokes operator + (Complex, Complex)
    cout << "Addition of c1 and c2 = ";
    c3.show();
    return 0;
}

1 个答案:

答案 0 :(得分:0)

friend不是会员。因此,改变这一行:

Complex Complex::operator+(Complex c1, Complex c2)

到:

Complex operator + (Complex c1, Complex c2)