The encoding of your source file and the execution environment's encoding may be wildly different. C++ makes no guarantees about any of this. You can check this by outputting the hexadecimal value of your string literal:
std::wcout << std::hex << L"ф";
Before C++11, you could use non-ASCII characters in source code by using their hex values:
"\x05" "five"
C++11 adds the ability to specify their Unicode value, which in your case would be
L"\u03A6"
If you're going full C++11 (and your environment ensures these are encoded in UTF-*), you can use any of char
, char16_t
, or char32_t
, and do:
const char* phi_utf8 = "\u03A6";
const char16_t* phi_utf16 = u"\u03A6";
const char32_t* phi_utf16 = U"\u03A6";