求助声明友元函数依然无法访问private数据

2018-07-15 03:19:38 145 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

ubuntu18.04安装R——无法连接上 dl.google.com:80 (6.6.6.6)，连接超时&&E: 无法修正错误，因为您要求某些软件包保持现状，就是它们破坏了软件包间的依赖关系。安装R的时候，sudo apt update 的时候出现错误：查资料要修改/etc/apt/sources.list.d/google-chrome.list 文件原来是： deb http://dl.google.com/linux/chrome/deb/ stable main 改为： deb [arch=amd64] http://dl.google.com/linux/chrom... 阅读详情

Coordinate.h

#ifndef COORDINATE_H

#define COORDINATE_H

class Coordinate

{

	friend ostream & operator<<(ostream& out, Coordinate & coor);

	friend Coordinate operator+(const Coordinate &c1, const Coordinate &c2);

private:

	int m_iX;

	int m_iY;

public:

	Coordinate(int x, int y);

	int getX();

	int getY();

	

	/*Coordinate operator+(const Coordinate &c);*/

};

#endif

Coordinate.cpp

#include "Coordiante.h"

#include<iostream>

#include<ostream>

using namespace std;





Coordinate::Coordinate(int x, int y)

{

	m_iX = x;

	m_iY = y;

}



int Coordinate::getX()

{

	return m_iX;

}



int Coordinate::getY()

{

	return m_iY;

}



//Coordinate Coordinate::operator+(const Coordinate & c)

//{

//	Coordinate temp(0,0);

//	temp.m_iX = this->m_iX + c.m_iX;

//	temp.m_iY = this->m_iY + c.m_iY;

//	return temp;

//}



ostream & operator<<(ostream & out, Coordinate & coor)

{

	out << coor.m_iX << ":" << coor.m_iY ;

	return out;

}



Coordinate operator+(const Coordinate & c1, const Coordinate & c2)

{

	Coordinate temp(0,0);

	temp.m_iX = c1.m_iX + c2.m_iX;

	temp.m_iY = c1.m_iY + c2.m_iY;

	return temp;

}

demo.cpp

#include"Coordiante.h"

#include<iostream>

using namespace std;



int main()

{

	Coordinate c1(1, 3);

	Coordinate c2(2, 3);

	Coordinate c3(0, 0);

	c3 = c1 + c2;

	cout << c3<<endl;

	system("pause");

}

IDE环境是VS2016 问题在于定义输出符号的重载的时候，VS提示无法访问m_iX 和m_iY

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