printf, wprintf, %s, %S, %ls, char* and wchar*: Errors not announced by a compiler warning?

Question

I have tried the following code:

wprintf(L\"1 %s\\n\",\"some string\"); //Good
wprintf(L\"2 %s\\n\",L\"some string\"); //Not good -> print only first char         


        

Answer 1

At least in Visual C++: printf (and other ACSII functions): %s represents an ASCII string %S is a Unicode string wprintf (and other Unicode functions): %s is a Unicode string %S is an ASCII string

As far as no compiler warnings, printf uses a variable argument list, with only the first argument able to be type checked. The compiler is not designed to parse the format string and type check the parameters that match. In cases of functions like printf, that is up to the programmer