下面是部分代碼

Line.cpp

#include<iostream>

#include"Line.h"

using namespace std;

? Line::Line(int x1, int y1, int x2, int y2) :m_coorA(x1,y1), m_coorB(x2, y2)

{

cout << "Line()" << endl;

}

Line::~Line()

{

cout << "~Line()" << endl;

}

void Line::setA(int x, int y)

{

m_coorA.setX(x);

m_coorA.setY(y);

}

void Line::setB(int x, int y)

{

m_coorB.setX(x);

m_coorB.setY(y);

}

void Line::printInfo()

{

cout << "printInfo()" << endl;

cout << "("m_coorA.getX() << "," << m_coorA.getY() << ")" << endl;

cout << "("m_coorB.getX() << "," << m_coorB.getY() << ")" << endl;

}

void Line::printInfo() const

{

cout << "printInfo()const" << endl;

cout << "("m_coorA.getX() << "," << m_coorA.getY() << ")" << endl;

cout << "("m_coorB.getX() << "," << m_coorB.getY() << ")" << endl;

}

Line.h

#include"Coordinate.h"

class Line

{

public:

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

~Line();

void setA(int x, int y);

void setB(int x, int y);

void printInfo();

void printInfo() const;

private:

const Coordinate m_coorA;

Coordinate m_coorB;

};

前兩個黑體部分錯誤提示：不兼容的類型限定符；

后四個黑體部分錯誤提示：未找到用戶定義的文本運算符。