Defined in header <locale.h> | ||
#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 ofsetlocale.
| Constant | Explanation |
LC_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 withLC_ followed by at least one uppercase letter, may be defined inlocale.h. For example, the POSIX specification requiresLC_MESSAGES (which controls, among other things,perror andstrerror), ISO/IEC 30112:2014 (2014 draft) additionally definesLC_IDENTIFICATION,LC_XLITERATE,LC_NAME,LC_ADDRESS,LC_TELEPHONE,LC_PAPER,LC_MEASUREMENT, andLC_KEYBOARD, which are supported by the GNU C library (except forLC_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 Englishsetlocale(LC_NUMERIC,"de_DE.utf8");// decimal dot will be Germansetlocale(LC_TIME,"ja_JP.utf8");// date/time formatting will be Japanesewchar_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: 3,14Date: 金曜日 2023年09月15日 20時04分14秒
| gets and sets the current C locale (function)[edit] | |
C++ documentation forlocale categories | |
