#include <iostream>

#include <string>

#include <assert.h>

using namespace std;

    //声明字符串拷贝函数

char* mystrcpy(char* str1,const char* str2);

class CPerson

{

    char* m_pName;

public:

    CPerson(char* pName)

    {

        cout<<"普通构造函数"<<endl;

        m_pName = new char[strlen(pName)+];

        if(m_pName)

        {

            mystrcpy(m_pName, pName);

        }

    }

//拷贝构造函数,只做位模式拷贝,即浅拷贝

//    CPerson(CPerson &p)

//    {

//        m_pName  = p.m_pName;

//    }

    //深拷贝 构造函数

    CPerson(CPerson &p)

    {

        cout<<"深拷贝构造函数"<<endl;

        m_pName = new char[strlen(p.m_pName)+];

        if(m_pName)

        {

            mystrcpy(m_pName, p.m_pName);

        }

    }

    ~CPerson()

    {

        cout<<"析构函数"<<endl;

        delete[] m_pName;

    }

};

int main()

{

    CPerson p1("Hello");

    CPerson p2(p1);

    //浅拷贝时,调用浅拷贝构造函数,p1.m_pName和p2.m_pName指针同时指向一个地址

    //析构函数调用时,会两次删除m_pName指针,造成错误,

    //所以要用深拷贝解决此问题

    return ;

}

//mystrcpy的实现

char* mystrcpy(char* str1,const char* str2)

{

    char* p = str1;

    assert(str1 != NULL && str2 != NULL);

    while(*str2)

    {

        *p = *str2;

        p++;

        str2++;

    }

    p = NULL;

    return str1;

}