C++拷贝构造函数的继承

拷贝构造函数要求把所有变量都需要做拷贝。在有继承关系情况先，子类的拷贝构造函数，需要调用父类拷贝构造函数。示例代码如下：

class Base{

public:

   virtual ~Base();

   Base(const char *pStr);

   Base(const Base &other);

   virtual void CallFunction() ;

public:

   char *m_pBase;

};

Base::Base(const char *pStr){

   if (pStr) {

       long iLen = strlen(pStr)+1;

       m_pBase = new char[iLen];

       memset(m_pBase, 0, iLen);

       strcpy(m_pBase, pStr);

   }}

Base::~Base(){

   if (m_pBase) {

       delete [] m_pBase;

       m_pBase = NULL;

    }

}

Base::Base(const Base &other){

   if (m_pBase) {

       delete m_pBase;

       m_pBase = NULL;

    }

   long iLen = strlen(other.m_pBase)+1;

   m_pBase = new char[iLen];

   memset(m_pBase, 0, iLen);

   strcpy(m_pBase, other.m_pBase);

}

class Child:public Base{

public:

   ~Child();

   Child(const char *pStr , const char *pBase);

   Child(const Child &other);

public:

   char *m_pChild;

};

Child::Child(const char *pStr , const char*pBase):Base(pBase){//初始化列表中调父类构造函数

   if (pStr) {

       long iLen = strlen(pStr)+1;

       m_pChild = new char[iLen];

       memset(m_pChild, 0, iLen);

       strcpy(m_pChild, pStr);

    }

}

Child::Child(const Child&other):Base(other){//调父类拷贝构造函数

   if (m_pChild) {

       delete m_pChild;

       m_pChild = NULL;

    }

   long iLen = strlen(other.m_pChild)+1;

   m_pChild = new char[iLen];

   memset(m_pChild, 0, iLen);

   strcpy(m_pChild, other.m_pChild);

}

Child::~Child(){

   if (m_pChild) {

       delete [] m_pChild;

       m_pChild = NULL;

    }

}

Test：

Child ch("child","base");

Child ch2(ch);

文章来源
http://www.cnblogs.com/zhidao-chen/p/3831320.html