_int64 没有命名类型

Question

在我的 pch 文件中，我有以下定义：

#if (_MSC_VER < 1300)
   typedef signed char       int8_t;
   typedef signed short      int16_t;
   typedef signed int        int32_t;
   typedef unsigned char     uint8_t;
   typedef unsigned short    uint16_t;
   typedef unsigned int      uint32_t;
#else
   typedef signed __int8     int8_t;
   typedef signed __int16    int16_t;
   typedef signed __int32    int32_t;
   typedef unsigned __int8   uint8_t;
   typedef unsigned __int16  uint16_t;
   typedef unsigned __int32  uint32_t;
#endif
typedef signed __int64       int64_t;
typedef unsigned __int64     uint64_t;  

当我构建应用程序时，我收到一条错误，

typedef signed __int64       int64_t;
typedef unsigned __int64     uint64_t; 

指出 _int64 未命名类型。可能是什么问题？

Answer 1

添加此包含

#include <inttypes.h>

然后使用 uint64_t 或 int64_t。

见下文

#include <inttypes.h>


#if (_MSC_VER < 1300)
   typedef signed char       int8_t;
   typedef signed short      int16_t;
   typedef signed int        int32_t;
   typedef unsigned char     uint8_t;
   typedef unsigned short    uint16_t;
   typedef unsigned int      uint32_t;
#else
   typedef signed __int8     int8_t;
   typedef signed __int16    int16_t;
   typedef signed __int32    int32_t;
   typedef unsigned __int8   uint8_t;
   typedef unsigned __int16  uint16_t;
   typedef unsigned __int32  uint32_t;
#endif
typedef signed __int64       int64_t;
typedef unsigned __int64     uint64_t;  

Answer 2

看来您正在尝试将 MSVC 特定的 __int64 类型与 GCC 一起使用。这不起作用，请改用long long。