Printing Unicode to console

This is a discussion on Printing Unicode to console within the Windows Programming forums, part of the Platform Specific Boards category; Code: #include <iostream> #include <string> int main() { std::cout << "こんにちは\n"; std::cin.get(); } I'm using Visual Studio. I tried running ...

  1. #1
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    Printing Unicode to console

    Code:
    #include <iostream>
    #include <string>
    
    int main() {
        std::cout << "こんにちは\n";
        std::cin.get();
    }
    I'm using Visual Studio. I tried running this program. It's supposed to print some Japanese characters, but all I see is ????. How do I get the characters to display properly?

  2. #2
    and the hat of int overfl Salem's Avatar
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    http://msdn.microsoft.com/en-us/libr...73(VS.85).aspx
    Set an appropriate code page perhaps?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  3. #3
    Registered User Codeplug's Avatar
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    In Windows, the only way to get Unicode characters (above 0x007F) to display on the console is to use WriteConsoleW(). Your console's font also needs to contain glyphs for the Unicode characters you're attempting to print.
    Code:
    #define _CRT_SECURE_NO_WARNINGS
    #include <windows.h>
    #include <iostream>
    #include <locale>
    #include <mbctype.h>
    using namespace std;
    
    #define SOURCE_IN_CP932
    
    // If using VC++, VS 2005 was the first to work with Unicode source code
    #if !defined(SOURCE_IN_CP932) && defined(_MSC_VER) && (_MSC_VER < 1400)
    #   error "Forget it! Time to upgrade"
    #endif
    
    #if defined(SOURCE_IN_CP932) && defined(__GNUC__)
    #   error "Stick with UTF8 source with MinGW"
    #endif
    
    int main()
    {
        wchar_t wmsg[32];
        size_t len;
    
    #ifdef SOURCE_IN_CP932
        const char msg[] = "こんにちは\n"; // save source file in CP 932
        cout << "sizeof(msg) = " << sizeof(msg) << endl;
    
        // convert CP 932 -> Unicode (UTF16LE on Windows)
        setlocale(LC_CTYPE, ".932");
        len = mbstowcs(wmsg, msg, sizeof(msg)/sizeof(*msg));
    #else
        // source already saved as Unicode, just copy the characters
        wcscpy(wmsg, L"こんにちは\n"); // save source file as Unicoode
        len = wcslen(wmsg);
    #endif
    
        if (wmsg[0] != 0x3053)
        {
            cerr << "Bad conversion detected, first character not U+3053" << endl;
    #ifdef SOURCE_IN_CP932
            cerr << "Source code must be saved under CP 932." << endl;
    #else
            cerr << "Source code must be saved using a Unicode encoding." << endl;
    #endif
            return 1;
        }//if
    
        DWORD written;
        if (!WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), 
                           wmsg, (DWORD)len,
                           &written, 0))
            cerr << "WriteConsole failed, le = " << GetLastError() << endl;
    
        return 0;
    }//main
    gg

  4. #4
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    Quote Originally Posted by Codeplug View Post
    In Windows, the only way to get Unicode characters (above 0x007F) to display on the console is to use WriteConsoleW().
    No, there are several ways (cf G. G.)...

  5. #5
    Registered User Codeplug's Avatar
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    >> No, there are several ways ...
    And yet you fail to provide any other ways...are we to just take your word for it?

    gg

  6. #6
    Registered User Codeplug's Avatar
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    >> (above 0x007F)
    That part of my statement is erroneous. Any visible characters in the console that didn't go through WriteConsoleW() are "code page characters" (for lack of a better term). Meaning the glyph that was displayed came from a lookup into a code page table.

    So if your source code is saved as Shift-JIS (code page 932), you could call SetConsoleOutputCP(932) and WriteConsoleA(msg). But Unicode isn't involved at this point - 'msg' is just a char string with a MBCS of CP 932. (Internally, MS uses the current CP to convert it into Unicode then calls the W version. Most, if not all, of the MS "ANSI" API's work this way.)

    gg

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    Thanks. I still see question marks because my font doesn't support these characters. Do you know of a font that does? I've tried adding several Japanese fonts that Windows came with to the command window as per http://support.microsoft.com/default...b;en-us;247815

    However, they don't show up in the font list so I'm assuming they don't meet the criteria or I'm adding them to the registry incorrectly.

  8. #8
    Registered User Codeplug's Avatar
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    Consolas is the only other font I've gotten to work with cmd.exe.

    gg

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