C编程，unicode和linux终端

So what I'm trying to do is write Japanese characters to my terminal screen using C and wide characters.

所以我要做的就是用C和宽字符把日语字符写到终端屏幕上。

The question is whats wrong with what I'm doing so that I can fix it, what other caveats should I expect while using wide characters and do you have any other comments about what I'm trying to do?

问题是我所做的事情有什么问题，我可以修正它，我在使用宽字符时应该期待什么其他的注意事项，你对我正在做的事情有什么其他的评论吗?

The bad code:

坏的代码:

#include <stdio.h>
#include <wchar.h>

int main( ) {
    wprintf(L"%c\n", L"\x3074");
}

This doesn't work, but I want to know why.

这行不通，但我想知道为什么。

the problem only gets worse when I try to use a wchar_t to hold a value:

当我试图使用wchar_t来保存一个值时，问题只会变得更糟:

wchar_t pi_0 = 0x3074;      // prints a "t" when used with wprintf
wchar_t pi_1 = "\x3074";    // gives compile time warning
wchar_t pi_2 = L"\x3074";   // gives compile time warning

So I'd also like to make this work too, as I plan on having data structures holding strings of these characters.

所以我也想让这个工作，因为我计划让数据结构持有这些字符的字符串。

Thanks!

谢谢!

2 个解决方案

#1

The type of "\x3074" is const char[] and the type of L"\x3074" is const wchar_t[].

“\x3074”的类型是const char[]， L“\x3074”的类型是const wchar_t[]。

If you need a wchar_t, use single quotes:

如果您需要wchar_t，请使用单引号:

L'\x3074'

Also %c prints a char, but for wchar_t you need a %lc.

同样，%c打印一个字符，但是对于wchar_t，您需要一个%lc。

#2

There are at least two problems in the code.

代码中至少有两个问题。

the first one has been pointed out by Kenny, the format doesn't match the argument
第一个是肯尼指出的，格式与论点不符。
the second one is that you miss a call to setlocale()
第二个问题是您错过了对setlocale()的调用

(There is also the assumption that the wide character set is Unicode -- I seem to remember it is always the case for Linux, but it isn't universal).

(还有一种假设，即宽字符集是Unicode——我似乎记得它一直是Linux的情况，但它不是通用的)。

In a correctly configured terminal,

在正确配置的终端中，

#include <stdio.h>
#include <wchar.h>
#include <locale.h>

int main( ) {
    setlocale(LC_ALL, "");
    wprintf(L"%ls\n", L"\x0152\x3074");
    return 0;
}

should work. If it doesn't, I would start by checking the result of setlocale() and wprint().

应该工作。如果没有，我将首先检查setlocale()和wprint()的结果。

(I've added U+0152 which is the OE ligature so that I can check the behavior; I'm not using a font which has U+3074)

(我已经加了U+0152，这是OE线，这样我可以检查行为;我没有使用U+3074的字体

#1