在C语言中打印宽字符出现问题。

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英文:

Problem with printing wide character in c

问题

你好,我想打印字母'å',它在扩展ASCII中是131,据我所知,它的UTF-8代码是00E5,UTF-16中是0x00E5。然而,在下面的代码中,程序打印出了'Õ',这不是我想要的。我不知道我做错了什么。提前谢谢。

int main(void) {
   wchar_t myChar = 0x00E5;
   wprintf(L"%lc", myChar);
}
英文:

Hello I want to print the letter 'å' which is 131 in extended ascii and as far as I can see has UTF-8 code 00E5 and 0x00E5 in UTF-16. However, in the code below the program prints 'Õ' which is not what I wanted. I do not know what I have done wrong. Thanks in advance.

int main(void) {

   wchar_t myChar = 0x00E5;

   wprintf(L"%lc", myChar);

}

答案1

得分: 4

我会尝试使用UTF-16字符字面量,并设置区域设置(setlocale)为CP_UTF_16LE(如果使用MSVC)或用户首选区域设置(如果不是)。

#ifdef _MSC_VER
#include <io.h>     // _setmode
#include <fcntl.h>  // _O_U16TEXT
#endif

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

void set_locale_mode() {
#ifdef _MSC_VER
    // Unicode UTF-16,小端字节顺序(ISO 10646的BMP)
    const char *CP_UTF_16LE = ".1200";

    setlocale(LC_ALL, CP_UTF_16LE);
    _setmode(_fileno(stdout), _O_U16TEXT);
#else
    // 设置用户首选区域设置
    setlocale(LC_ALL, "");
#endif
}

int main(void) {
    set_locale_mode();  // 在任何其他输出之前执行此操作

    // 使用Unicode为`&#229;`的UTF-16字符字面量:
    wchar_t myChar = u'\u00E5';

    wprintf(L"%lc", myChar);
}

在Windows 11上使用VS2022进行了测试。

英文:

I'd try using an UTF-16 character literal and also set the locale (setlocale) to CP_UTF_16LE if using MSVC or to the user-preferred locale if not.

#ifdef _MSC_VER
#include &lt;io.h&gt;     // _setmode
#include &lt;fcntl.h&gt;  // _O_U16TEXT
#endif

#include &lt;stdio.h&gt;
#include &lt;locale.h&gt;
#include &lt;wchar.h&gt;

void set_locale_mode() {
#ifdef _MSC_VER
    // Unicode UTF-16, little endian byte order (BMP of ISO 10646)
    const char *CP_UTF_16LE = &quot;.1200&quot;;

	setlocale(LC_ALL, CP_UTF_16LE);
    _setmode(_fileno(stdout), _O_U16TEXT);
#else
    // set the user-preferred locale
    setlocale(LC_ALL, &quot;&quot;);
#endif
}

int main(void) {
    set_locale_mode();  // do this before any other output

	// UTF-16 character literal with unicode for `&#229;`:
	wchar_t myChar = u&#39;\u00E5&#39;;

	wprintf(L&quot;%lc&quot;, myChar);
}

Tested in Windows 11 with VS2022

答案2

得分: 1

在Windows上,要输出Unicode字符,需要更改控制台模式:

#include&lt;fcntl.h&gt;
#include &lt;io.h&gt;
#include &lt;stdio.h&gt;

int main(void) {
    _setmode(_fileno(stdout), _O_U16TEXT);

    // UTF-16 character literal with unicode for `&#229;`:
    wchar_t myChar = 0x00E5;

    // Adding U+20AC EURO SIGN as well.
    wprintf(L"\u20ac%lc", myChar);
}

输出:

ی
英文:

On Windows, to output Unicode characters the console mode needs to be changed:

#include&lt;fcntl.h&gt;
#include &lt;io.h&gt;
#include &lt;stdio.h&gt;

int main(void) {
    _setmode(_fileno(stdout), _O_U16TEXT);

    // UTF-16 character literal with unicode for `&#229;`:
    wchar_t myChar = 0x00E5;

    // Adding U+20AC EURO SIGN as well.
    wprintf(L&quot;\u20ac%lc&quot;, myChar);
}

Output:

€&#229;

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  • 本文由 发表于 2023年6月22日 04:04:27
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