Most of those characters take more than a byte to encode, but std::cout's currently imbued locale will only output ASCII characters. For that reason you're probably seeing a lot of weird symbols or question marks in the output stream. You should imbue std::wcout with a locale that uses UTF-8 since these characters are not supported by ASCII:
// is required for this code.
std::locale::global(std::locale("en_US.utf8"));
std::wcout.imbue(std::locale());
std::wstring s = L"šđč枊ĐČĆŽ";
std::wcout << s;
For Windows systems you will need the following code:
#include
#include
#include
#include
int main()
{
_setmode(_fileno(stdout), _O_WTEXT);
std::wstring s = L"šđč枊ĐČĆŽ";
std::wcout << s;
return 0;
}