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• 如何使用宏观功能撰写以下法典:
原标题:How to write the below piece of code using macro function?

www.un.org/spanish/ecosoc 我应如何用宏观功能撰写以下的法典:。

#ifdef LOG_ENABLED      
    m_logger->Log(szType,szMessage);
#endif

I have done something like mentioned below and it resulted in error:-

#define _LOG_MSG_CND_BEGIN_ #ifdef LOG_ENABLED
#define _LOG_MSG_CND_END_ #endif
#define WriteLogMessage(szType,szMessage) 
{
_LOG_MSG_CND_BEGIN_
    m_logger->Log(szType,szMessage);
_LOG_MSG_CND_END_
}

让我知道,如何为上述三部法典撰写宏观功能,而没有任何错误。

我对同一部法典使用了条形功能,但在编织一号时,便认为在线功能没有被作为线性功能对待,因此希望在这种情况下使用宏观功能。

www.un.org/spanish/ecosoc 在线功能,如以下所述:

inline void WriteLogMessage(LOG_LEVEL szType, LPCTSTR szMessage){
#ifdef LOG_ENABLED      
    m_logger->Log(szType,szMessage);
#endif
}
问题回答

标准C处理器是一种辅助器,根本不懂。 你们想要的是:

#if defined LOG_ENABLED
#define WriteLogMessage(szType,szMessage) m_logger->Log(szType,szMessage)
#else
#define WriteLogMessage(szType,szMessage)
#endif

程序前指令必须是一条行文:

#define _LOG_MSG_CND_BEGIN_ 
#ifdef LOG_ENABLED
#define _LOG_MSG_CND_END_ 
#endif
#define WriteLogMessage(szType,szMessage) 
{
_LOG_MSG_CND_BEGIN_
    m_logger->Log(szType,szMessage);
_LOG_MSG_CND_END_
}

EDIT:如果你想要将宏观扩大到其他宏观,那是不可能的。





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