C/C++写DLL时头文件的一般格式

#ifndef _READER_API_
#define _READER_API_

#ifdef _DLL_EXPORT_
#define READER_API __declspec(dllexport)
#else
#define READER_API __declspec(dllimport)
#endif

#ifdef __cplusplus
extern "C"
{
#endif

READER_API int rfidRead(INT32U serial_com_port,INT16U bank,INT16U offset,INT16U count,char* data);
READER_API int rfidWrite(INT32U serial_com_port,INT16U bank,INT16U offset,INT16U count,char* data);

#ifdef __cplusplus
};
#endif

#endif