指向对象链表的 C++ 数组，我在函数中创建对象

Question

编辑：完整程序https://onecompiler.com/cpp/3z5p2rpgk 我有一个指向 MailServer 类中 CMail 对象链接列表的指针数组。 (CMail **m_Sent;)

在 sendMail() 函数中，我将复制对象并在字段 (m_Sent) 中添加指向它的链接 - 如果它不在字段中。

如果字段 (m_Sent) 中已经存在同名链接，我将遍历同名项目 (m_From item) 上的链表到列表末尾，并在那里添加对象。

函数，但是它不能正常工作，你会注意到它变成了 sendMail 函数的索引 0。

    class CMail
    {
      public:
          CMail (const char *from, const char *to, const char *body);
          CMail(const CMail &src);
          ~CMail();
    
          CMail& operator = (CMail &&src) noexcept;
    
          bool compareByFrom(const CMail &x) const;
    
          void setNext(CMail &x);
          
          CStr getFrom() const;
          CMail *getLast();
    
      private:
          CStr m_From;
          CStr m_To;
          CStr m_Body;
          CMail *m_Next;
    };
    
    
    CMail::~CMail()
    {
    
    }
    
    CMail::CMail (const char *from, const char *to, const char *body)
    : m_From(from),
      m_To(to),
      m_Body(body),
      m_Next(nullptr)
    {
    }
    
    CMail::CMail(const CMail &src)
    :   m_From(src.m_From),
        m_To(src.m_To),
        m_Body(src.m_Body),
        m_Next(src.m_Next)
    {
    }
    
    
    CMail& CMail::operator = (CMail &&src) noexcept
    {
        if(this == &src)
            return *this;
        
        m_From = src.m_From;
        m_To = src.m_To;
        m_Body = src.m_Body;
        m_Next = src.m_Next; // mozna chyba
     
        return *this;
    }
    
    bool CMail::compareByFrom(const CMail &x) const
    {
        if(m_From == x.m_From)
            return true;
        return false;
    }
    
    
    CMail *CMail::getLast() 
    {
        CMail *tmp;
        CMail *x;
        while(tmp)
        {
            x = tmp;
            tmp = tmp->m_Next;
        }
        return x;
    }
    
    void CMail::setNext(CMail &x)
    {
        m_Next = &x;
    }
    
class CMailServer { 

public: 
        CMailServer (void); 
        void sendMail (const CMail &m);

        private: CMail **m_Sent; 
 };
    
    CMailServer::CMailServer (void)
    :   m_Capacity_Sent(1000),
        m_Capacity_Acept(1000),
        m_Len_Sent(0),
        m_Len_Acept(0)
    {
        m_Sent = (CMail**) malloc(sizeof(CMail*)*m_Capacity_Sent);
        m_Acept = (CMail**) malloc(sizeof(CMail*)*m_Capacity_Acept);
    }
    
    CMailServer::~CMailServer (void)
    {
    }
    
    void CMailServer::sendMail (const CMail &m)
    {
        // nastaveni send 
        for(size_t i=0; i<m_Len_Sent; i++)
        {
            if(m_Sent[i]->compareByFrom(m))
            { 
                CMail a = m;
                m_Sent[i]->getLast()->setNext(a);
                return;
            }
        }
    
        CMail a = m;
        m_Sent[m_Len_Sent++] = &a;
        cout << "Zde: " << m_Sent[0]->getFrom() << endl;
    
    }


int main ( void )
{  CMail a( "john", "M", "progtest deadline" );
  CMail b( "peter", "N", "progtest deadline" );
  CMailServer server;
  
  server.sendMail(a); server.sendMail(b);
}