C++ TCHAR 和 WCHAR 有什么区别？
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What is difference between TCHAR and WCHAR?
提问by Mihran Hovsepyan
回答by bmargulies
If you read the entire header, you will find:
如果您阅读整个标题，您会发现：
#ifdef _UNICODE
typedef WCHAR TCHAR;
#else
typedef char TCHAR;
#endif
or words to that effect.
或大意的词。
Perhaps MS has removed the narrow option of late.
也许 MS 已经删除了最近的窄选项。
回答by Wyatt Anderson
TCHARcan be either charor WCHARbased on the platform. WCHARis always a 16-bit Unicode character, wchar_t.
TCHAR可以是char或WCHAR基于平台。WCHAR始终是 16 位 Unicode 字符，wchar_t.
回答by Sagar
http://msdn.microsoft.com/en-us/library/aa383751%28VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/aa383751%28VS.85%29.aspx
TCHAR:
查尔：
A WCHAR if UNICODE is defined, a CHAR otherwise.
如果定义了 UNICODE，则为 WCHAR，否则为 CHAR。
WCHAR:
WCHAR：
A 16-bit Unicode character. For more information, see Character Sets Used By Fonts.
一个 16 位 Unicode 字符。有关更多信息，请参阅字体使用的字符集。
回答by Mohit Dabas
Technically speaking there is no difference because you cannot typedef two different entities to a single one. Let us See An Example...
从技术上讲，没有区别，因为您不能将两个不同的实体定义为一个。让我们看一个例子...
typedef char a;
typedef char b;
typedef a b, c;
This Definition Works But If a Change The Above Definition To This
此定义有效，但如果将上述定义更改为此
typedef char a;
typedef char * b;
typedef a b, c;
Error 1 error C2040: 'b' : 'a' differs in levels of indirection from 'char *'
错误 1 错误 C2040：“b”：“a”与“char *”的间接级别不同
Another One
另一个
typedef char a;
typedef int b;
typedef a b, c;
Error 1 error C2371: 'b' : redefinition; different basic types
错误 1 错误 C2371：'b'：重新定义；不同的基本类型
So By Analyzing These Things Only Same Type Can Defined Together.
所以通过分析这些东西，只有相同的类型才能定义在一起。
