#define LC_ALL /* implementation-defined */
#define LC_COLLATE /* implementation-defined */
#define LC_CTYPE /* implementation-defined */
#define LC_MONETARY /* implementation-defined */
#define LC_NUMERIC /* implementation-defined */
#define LC_TIME /* implementation-defined */
Each of the above macro constants expand to integer constant expressions with distinct values that are suitable for use as the first argument of setlocale.
Constant ExplanationLC_ALL selects the entire C locale LC_COLLATE selects the collation category of the C locale LC_CTYPE selects the character classification category of the C locale LC_MONETARY selects the monetary formatting category of the C locale LC_NUMERIC selects the numeric formatting category of the C locale LC_TIME selects the time formatting category of the C locale
Additional macro constants, with names that begin with LC_ followed by at least one uppercase letter, may be defined in locale.h. For example, the POSIX specification requires LC_MESSAGES (which controls, among other things, perror and strerror), ISO/IEC 30112:2014 (2014 draft) additionally defines LC_IDENTIFICATION, LC_XLITERATE, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_PAPER, LC_MEASUREMENT, and LC_KEYBOARD, which are supported by the GNU C library (except for LC_XLITERATE).
#include <locale.h>
#include <stdio.h>
#include <time.h>
#include <wchar.h>
int main(void)
{
setlocale(LC_ALL, "en_US.UTF-8"); // the C locale will be the UTF-8 enabled English
setlocale(LC_NUMERIC, "de_DE.utf8"); // decimal dot will be German
setlocale(LC_TIME, "ja_JP.utf8"); // date/time formatting will be Japanese
wchar_t str[100];
time_t t = time(NULL);
wcsftime(str, 100, L"%A %c", localtime(&t));
wprintf(L"Number: %.2f\nDate: %Ls\n", 3.14, str);
}
Possible output:
Number: 3,14 Date: éææ¥ 2023å¹´09æ15æ¥ 20æ04å14ç§[edit] References
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