函数操作符重载

class CMyString{   CMyString(char* pData = NULL);   CMyString(const CMyString& str);   ~CMyString(void);   private:char* m_pData;}

CMString& CMString::operator = (const CMString &str){   if(this == str)return *this;   delete[] m_pData;   m_pData=NULL;   m_pData = new char(strlen(str.m_pData)+1);   strcpy(m_pData,str.m_pData);   return *this;}