结构体置0的问题

程序中常常需要对结构体置0，但是要注意：

如果结构体中有类，不能置0；置0会导致已经实例化的类变量，地址变为0

如果结构体中有其它结构体，也要当心，如果所包含的结构体中有指针，而指针已经分配了地址（如new过），此时置0，会导致内存泄漏

如：

struct ClientContext
{


    SOCKET                m_Socket;                    ///Socket
    char                m_IP[20];                    ///IP
    WORD                nPort;                        ///端口

    // Store buffers
    CLeesBuffer*                m_pReadBuffer;                ///读BUFFER
    CLeesBuffer*                m_pWriteBuffer;                ///写BUFFER

    // Input Elements for Winsock
    WSABUF                m_wsaInBuffer;                ///socket 读缓冲
    BYTE                m_byInBuffer[SOCKET_BUFFERSIZE];            ///读缓冲

    // Output elements for Winsock
    WSABUF                m_wsaOutBuffer;
    HANDLE                m_hWriteComplete;
    HANDLE                m_hDisconnect;

    // Message counts... purely for example purposes
    LONG                m_nMsgIn;
    LONG                m_nMsgOut;

    OVERLAPPEDPLUS*        pOverlap_ioRead;
    OVERLAPPEDPLUS*        pOverlap_ioWrite;
    OVERLAPPEDPLUS*        pOverlap_ioInit;
    OVERLAPPEDPLUS*        pOverlap_ioIdle;
    CTime                m_tLastActiveTime;

    //以下为用户逻辑部分

    BOOL                m_bIsHandShaked;            ///是否已经完成握手
};