C++ wchar_t* 不工作

Question

    wchar_t* Pfad;
    wcin >> Pfad;

wchar_t* file = Pfad + "*.quiz";

Not working for me, how can I make this work? It says "*.quiz" is wrong, something like it has to be a numeric value or something like that.

Well sorry, I am new to c++...

and my actual problem is, I use this, but I want to user to select the path

something like cin >> file

but I don't want the user to have to type "*.quiz";

wchar_t* file = L"C:/Users/Niku/Documents/Visual Studio 2012/Projects/Quiz/Quiz/Fragen_Niko/*.quiz"; 
WIN32_FIND_DATA FindFileData;
 HANDLE hFind;
hFind = FindFirstFile(file, &FindFileData); 

if( hFind != INVALID_HANDLE_VALUE ) {
max++;
while ((x = FindNextFile(hFind, &FindFileData)) == TRUE)
max++;
}

If I use anything else besides wchar_t* it's not working..

Answer 1

It's not working the way you are expecting because you don't fully understand pointers and string literals in C++. If you want to know what's wrong, please pick any of these books (possibly beginner ones).

If you want to fix this problem straight ahead (take a shortcut) use an std::wstring instead:

std::wstring Pfad;
std::wcin >> Pfad;
auto file = Pfad + L"*.quiz";

Live demo

As suggested by Rook , if you have to pass a pointer to C APIs you can use the member function std::wstring::c_str , which will return a const wchar_t* for you to use.