c ++无法获得"wcout"来打印unicode，并留下"cout"在职的 [英] c++ can't get "wcout" to print unicode, and leave "cout" working

问题描述

无法获得"wcout"在多个代码页中打印unicode字符串，并留下"cout"工作

can't get "wcout" to print unicode string in multiple code pages, together with leaving "cout" to work

请帮助我让这3条线一起工作.

please help me get these 3 lines to work together.

std::wcout<<"abc "<<L'\u240d'<<" defg "<<L'א'<<" hijk"<<std::endl;
std::cout<<"hello world from cout! \n";
std::wcout<<"hello world from wcout! \n";

输出:

abc hello world from cout!

我尝试过:

#include <io.h> 
#include <fcntl.h>
_setmode(_fileno(stdout), _O_U8TEXT);

问题:"wcout"失败

problem: "wcout" failed

尝试:

std::locale mylocale("");
std::wcout.imbue(mylocale);

和:

SetConsoleOutputCP(1251);

和

setlocale(LC_ALL, "");

和

SetConsoleCP(CP_UTF8)

什么都没做

推荐答案

C ++说:

[C ++ 11:27.4.1/3]:在相应的宽字符流和窄字符流上的混合操作遵循与在 FILE s，如ISO C标准的修订1所述.

[C++11: 27.4.1/3]: Mixing operations on corresponding wide- and narrow-character streams follows the same semantics as mixing such operations on FILEs, as specified in Amendment 1 of the ISO C standard.

引用的文档说:

更改了流的定义，以包括文本流和二进制流的方向概念.在将流与文件关联之后，但是在对该流执行任何操作之前，该流没有方向.如果将宽字符输入或输出功能应用于没有方向的流，则该流将变为宽方向.同样，如果将字节输入或输出操作应用于具有方向的流，则该流将变为面向字节的.此后，只有 fwide()或 freopen()函数可以更改流的方向.

The definition of a stream was changed to include the concept of an orientation for both text and binary streams. After a stream is associated with a file, but before any operations are performed on the stream, the stream is without orientation. If a wide-character input or output function is applied to a stream without orientation, the stream becomes wide-oriented. Likewise, if a byte input or output operation is applied to a stream with orientation, the stream becomes byte-oriented. Thereafter, only the fwide() or freopen() functions can alter the orientation of a stream.

字节输入/输出功能不得应用于宽方向的流，宽字符输入/输出功能不应适用于面向字节的流.

根据我的解释，简而言之，请勿混用 std :: cout 和 std :: wcout .

By my interpretation this means, in short, do not mix std::cout and std::wcout.

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