towupper
towupper
在头文件 | | |
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win_t towupper(wint_t wc); | | (自C95以来) |
如果可能,将给定的宽字符转换为大写字符。
参数
wc | - | 宽字符被转换 |
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返回值
如果在当前C语言环境中wc
未wc
列出大写版本,则为大写版本或未修改。
注意
该函数只能执行1:1的字符映射,例如,'ß'的大写形式是(有些例外)双字符字符串“SS”,这是无法通过该函数获得的towupper
。
示例
#include <stdio.h>
#include <wchar.h>
#include <wctype.h>
#include <locale.h>
int main(void)
{
wchar_t wc = L'\u017f'; // Latin small letter Long S ('ſ')
printf("in the default locale, towupper(%#x) = %#x\n", wc, towupper(wc)
setlocale(LC_ALL, "en_US.utf8"
printf("in Unicode locale, towupper(%#x) = %#x\n", wc, towupper(wc)
}
输出:
in the default locale, towupper(0x17f) = 0x17f
in Unicode locale, towupper(0x17f) = 0x53
参考
- C11标准(ISO/IEC 9899:2011):
See also
towlower (C95) | converts a wide character to lowercase (function) |
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toupper | converts a character to uppercase (function) |
| C++ documentation for towupper |
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