coordiante.h

class coordinate

{

public:

coordinate(int x, int y);

~coordinate();

int getx();

int gety();

public:

int m_ix;

int m_iy;

};

coordinate.cpp

#include"coordinate.h"

#include<iostream>

using namespace std;

coordinate::coordinate(int x, int y)

{

m_ix = x;

m_iy = y;

cout << "(" << m_ix << "," << m_iy << ")" << endl;

}

coordinate::~coordinate()

{

cout << "我是析构函数" << endl;

}

int coordinate::getx()

{

return m_ix;

}

line.h

#include"coordinate.h"

class line

{

line(int x1, int y1, int x2, int y2);

~line();

void printinfo();

private:

coordinate *m_pcoora;

coordinate *m_pcoorb;

};

line.cpp

#include"line.h"

#include<iostream>

using namespace std;

line::line(int x1, int y1, int x2, int y2)

{

m_pcoora = new coordinate(x1, y1);

m_pcoorb = new coordinate(x2, y2);

cout << "line" << endl;

}

line::~line()

{

delete m_pcoora;

m_pcoora = NULL;

delete m_pcoorb;

m_pcoorb = NULL;

cout << "~line" << endl;

}

void line::printinfo()

{

cout << "(" << m_pcoora->getx() << "," << m_pcoora->gety() << ")" << endl;

cout << "(" << m_pcoorb->getx() << "," << m_pcoorb->gety << ")" << endl;

}

main.cpp

#include<iostream>

#include"line.h"

using namespace std;

int main()

{

line *p = new line(1, 2, 3, 4);

delete p;

p = NULL;

system("pause");

return 0;

}

出现的错误：

严重性 代码 说明 项目 文件 行 禁止显示状态

错误(活动) E0330 "line::line(int x1, int y1, int x2, int y2)" (已声明 所在行数:6，所属文件:"E:\VS-c++\thispoint\thispoint\line.h") 不可访问 thispoint E:\VS-c++\thispoint\thispoint\main.cpp 8

严重性 代码 说明 项目 文件 行 禁止显示状态

错误(活动) E0330 "line::~line()" (已声明 所在行数:7，所属文件:"E:\VS-c++\thispoint\thispoint\line.h") 不可访问 thispoint E:\VS-c++\thispoint\thispoint\main.cpp 10

严重性 代码 说明 项目 文件 行 禁止显示状态

错误 C3867 “coordinate::gety”: 非标准语法；请使用 "&" 来创建指向成员的指针 thispoint e:\vs-c++\thispoint\thispoint\linecpp.cpp 25