VC++2008中的unsigned short和wchar_t

转自： http://blog.youkuaiyun.com/dingdangbears/archive/2009/03/05/3956147.aspx

 

原来c++内置wchar_t。

这就好比下面的代码：

    short sh;
   unsigned short ush;
   ush = sh; //ok
   short* pShort;
   unsigned short* pChar;
   pShort = pChar;// illegal

   long l;
   unsigned long ul;
   ul = l; //ok
   long *pL;
   unsigned long *pul;
   pL = pul;// illegal

short可以隐式转换为unsigned short, 而short*不可以隐式转换为unsigned short*;

long可以隐式转换为unsigned long, 而long*不可以隐式转换为unsigned long*;

同理：TCHAR(wchar_t)可以隐式转换为XChar(unsigned short), 而TCHAR*(wchar_t*)不可以隐式转换为XChar*(unsigned short*)。

解决方案：

1，设置Property --> C/C++ --> language --> Treat wchar_t as Build-in Type为NO. wchar_t不是内置的了，而是typedef unsigned short wchar_t。

2，用reinterpret_cast

3，改typedef unsigned short XChar 为 typedef wchar_t XChar。