复制构造函数

//复制构造函数
#include "stdafx.h"
#include <iostream>
using namespace std;

class CPen
{
private:
    int m_size;
public:
    CPen(int size);
    CPen(CPen &pen);
    int GetSize();
    void Write();
};
CPen::CPen(int size)
{
    m_size = size;
}
CPen::CPen(CPen &pen)
{
    m_size = pen.GetSize();
    cout << "size and long" << endl;
}
int CPen::GetSize()
{
    return m_size;
}
void CPen::Write()
{
    cout << "the value of m_size if:" << GetSize() << endl;
}

int main(int argc, char* argv[])
{
    //printf("Hello World!\n");
    CPen pen1(10);
    pen1.Write();
    CPen pen2(pen1);
    pen2.Write();
    return 0;
}