How to test if a string has a certain unicode char?

Supose you have a command line executable that receives arguments. This exec开发者_如何学JAVAutalbe is widechar ready and you want to test if one of this arguments starts with an HYPHEN case in which its an option:

command -o foo

how you could test it inside your code if you don't know the charset been used by the host? Should be not possible to a given console to produce the same HYPHEN representation by another char in the widechar forest? (in such case it would be a wild char :P)

int _tmain(int argc, _TCHAR* argv[])
{
   std::wstring inputFile(argv[1]);
   if(inputFile->c_str() <is an HYPHEN>)
   {
      _tprintf(_T("First argument cannot be an option"));
   }
}

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In your case, Windows will deliver the command line as a UTF-16 string so you shouldn't need to worry about character sets. Just check (inputFile->c_str()[0] == L'-') and you should be good to go. Of course UTF-16 is a variable-length encoding but the hyphen character is represented by a single wide-char value.