How to output unicode in C ++ without _setmode

Question

I am trying to insert a unicode value, in this case, \ u250F or ┏, to the console output. I searched around and people recommend different things. Before discussing what I tried, I use Windows and Visual Studio 2013.

Main mistake

When I try to make several “fixes,” if not specified, I always get the same error:

Debug Assertion Failed!
Program: ...nts\visual studio 2013\Projects\roguelike\Debug\roguelike.exe
File: f:\dd\vctools\crt\crtw32\stdio\fputc.c
Line: 48

Expression: ((_Stream->_flag & _IOSTRG) || ( fn = _fileno(_Stream), 
((_textmode_safe(fn) ==  _IOINFO_TM_ANSI && !_tm_unicode_safe(fn))))

For more information on how your program can cause an assertion failure, 
see the Visual C++ documentation on asserts

(Press Retry to debug the application)

What i tried

I tried to do all of the following to output it:

std::cout << "\u250F";

std::wcout << "\u250F";

std::cout << L"\u250F";

std::wcout << L"\u250F";

std::cout << "┏";

std::wcout << "┏";

std::cout << L"┏";

std::wcout << L"┏";

How I tried to tell the console how to output unicode

_setmode(_fileno(stdout), _O_U16TEXT);

It seems to be a problem, really.

system("chcp 65001");

Not a mistake, but does nothing

std::locale::global(std::locale("en_US.utf8"));

This causes an error when the parameters are "illegal"

Answer 1

: ENV: vs2013, win7_x64, system locale - " ()"

SetConsoleOutputCP(CP_UTF8);
_setmode(_fileno(stdout), _O_U8TEXT);
wprintf(L"Interface %s\r\n", pNP->pszwName);   //pszwName is a wchar_t*

, char "┏"?

google 'cmd font fontlink', cmd.

'chcp 65001' cmd .

Answer 2

. , .

io.h fcntl.h :

#include <fcntl.h>  
#include <io.h>

, :

#include <io.h>
#include <fcntl.h>