How I print these UTF-8 characters in C++?
- 1depends on what font you use, whether it's unix or windows, whether you are writing a console or a GUI api.John Knoeller– John Knoeller2010-01-23 05:29:34 +00:00Commented Jan 23, 2010 at 5:29
- preferably cross platform consoley2k– y2k2010-01-23 06:11:48 +00:00Commented Jan 23, 2010 at 6:11
- These characters aren't part of the ASCII character set, which means you have to select a font that contains them before you can print them. There is no cross platform way to select fonts for console apps. I don't think you can do it at all on Windows.John Knoeller– John Knoeller2010-01-23 08:34:28 +00:00Commented Jan 23, 2010 at 8:34
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3 Answers
Just output the appropriate bytes to your terminal, and make sure the terminal is using a UTF-8 encoding to display your data. C++ itself is relatively UTF8-agnostic. It's just an array of uint_8's.
(Unless you want to use some sort of character-oriented operations on strings with UTF-8. Then you need to use UTF-8 manipulation functions, instead of array indexes and the normal string manipulation routines.)
e.g. sprintf("%c%c%c\n", 0xE2, 0x99, 0xA0);
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Well, you know it is possible because your browser could render them. On Windows you can use the charmap.exe applet to discover their Unicode code points:
- ♠ = 0x2660
- ♣ = 0x2663
- ♥ = 0x2665
- ♦ = 0x2666
The challenge is to get a C/C++ program to display them. That's not going to be possible in any kind of non-platform specific way unless you use a cross-platform UI library like Qt or wxWidgets. In a Windows GUI program you can do it like this in the WM_PAINT message handler:
case WM_PAINT: { hdc = BeginPaint(hWnd, &ps); HFONT hFont = CreateFont(16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, L"Arial Unicode MS"); HGDIOBJ oldFont = SelectObject(hdc, hFont); RECT rc = {0, 0, 666, 16}; DrawTextEx(hdc, L"\x2660\x2663\x2665\x2666", -1, &rc, DT_LEFT, 0); SelectObject(hdc, oldFont); DeleteObject(hFont); EndPaint(hWnd, &ps); } break; 
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In C++: std::wcout << L"wstr [" << wstr << L']' << std::endl;
In C: printf("%ls\n\n",wstr);
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jamesdlin
wchar_t isn't guaranteed to be UTF-16. It's certainly not going to be UTF-8.