C++ 如何初始化和打印 std::wstring？
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How to initialize and print a std::wstring?
提问by Roee Gavirel
I had the code:
我有代码：
std::string st = "SomeText";
...
std::cout << st;
and that worked fine. But now my team wants to move to wstring.
So I tried:
效果很好。但现在我的团队想搬到wstring. 所以我试过：
std::wstring st = "SomeText";
...
std::cout << st;
but this gave me a compilation error:
但这给了我一个编译错误：
Error 1 error C2664: 'std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax> &)' : cannot convert parameter 1 from 'const char [8]' to 'const std::basic_string<_Elem,_Traits,_Ax> &' D:...\TestModule1.cpp 28 1 TestModule1
错误 1 错误 C2664：“std::basic_string<_Elem,_Traits,_Ax>::basic_string(const std::basic_string<_Elem,_Traits,_Ax> &)”：无法将参数 1 从“const char [8]”转换为'const std::basic_string<_Elem,_Traits,_Ax> &' D:...\TestModule1.cpp 28 1 TestModule1
After searching the web I read that I should define it as:
在网上搜索后，我读到我应该将其定义为：
std::wstring st = L"SomeText"; // Notice the "L"
...
std::cout << st;
this compiled but prints "0000000000012342"instead of "SomeText".
这编译但打印"0000000000012342"而不是"SomeText".
What am I doing wrong ?
我究竟做错了什么 ？
回答by Bo Persson
To display a wstring you also need a wide version of cout - wcout.
要显示 wstring，您还需要一个宽版本的 cout - wcout。
std::wstring st = L"SomeText";
...
std::wcout << st;
回答by hmjd
Use std::wcoutinstead of std::cout.
使用std::wcout代替std::cout。
回答by Val
This answer apply to "C++/CLI" tag, and related Windows C++ console.
此答案适用于“C++/CLI”标签和相关的 Windows C++ 控制台。
If you got multi-bytes characters in std::wstring, two more things need to be done to make it work:
如果在 std::wstring 中有多字节字符，则还需要做两件事才能使其工作：
- Include headers
#include <io.h>#include <fcntl.h> - Set stdout mode
_setmode(_fileno(stdout), _O_U16TEXT)
- 包括标题
#include <io.h>#include <fcntl.h> - 设置标准输出模式
_setmode(_fileno(stdout), _O_U16TEXT)
Result:
结果：
回答by Hemant Metalia
try to use use std::wcout<<stit will fix your problem.
尝试使用使用 std::wcout<<st它会解决你的问题。
std::wstring st = "SomeText";
...
std::wcout << st;
