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Showing content from https://en.cppreference.com/w/cpp/algorithm/../algorithm/../../cpp/../c/string/wide/towctrans.html below:

towctrans - cppreference.com

wint_t towctrans( wint_t wc, wctrans_t desc );

(since C95)

Maps the wide character wc using the current C locale's LC_CTYPE mapping category identified by desc.

[edit] Parameters wc - the wide character to map desc - the LC_CTYPE mapping, obtained from a call to wctrans [edit] Return value

The mapped value of wc using the mapping identified by desc in LC_CTYPE facet of the current C locale.

[edit] Example

#include <locale.h>
#include <wctype.h>
#include <wchar.h>
#include <stdio.h>
 
int main(void)
{
    setlocale(LC_ALL, "ja_JP.UTF-8");
    const wchar_t kana[] = L"ãã©ã¬ã";
    size_t sz = sizeof kana / sizeof *kana;
    wchar_t hira[sz];
    for (size_t n = 0; n < sz; ++n)
        hira[n] = towctrans(kana[n], wctrans("tojhira"));
    printf("katakana characters %ls are %ls in hiragana\n", kana, hira);
}

Output:

katakana characters ãã©ã¬ã are ã²ãããª in hiragana

[edit] References

C23 standard (ISO/IEC 9899:2024):

7.30.3.2.1 The towctrans function (p: TBD)

C17 standard (ISO/IEC 9899:2018):

7.30.3.2.1 The towctrans function (p: TBD)

C11 standard (ISO/IEC 9899:2011):

7.30.3.2.1 The towctrans function (p: 454)

C99 standard (ISO/IEC 9899:1999):

7.25.3.2,1 The towctrans function (p: 400)

[edit] See also

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