LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME - cppreference.com

##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME

From cppreference.com
< cpp‎ | locale

Defined in header `<clocale>` |  |
#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 std::setlocale.

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 with `LC_` followed by at least one uppercase letter, may be defined in `<clocale>`. For example, the POSIX specification requires LC_MESSAGES (which controls std::perror and std::strerror) and the GNU C library additionally defines LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, and LC_IDENTIFICATION.

### [edit] Example

Run this code

    #include <cstdio>
    #include <clocale>
    #include <ctime>
    #include <cwchar>

    int main()
    {
        std::setlocale(LC_ALL, "en_US.UTF-8"); // the C locale will be the UTF-8 enabled English
        std::setlocale(LC_NUMERIC, "de_DE");   // decimal dot will be German
        std::setlocale(LC_TIME, "ja_JP");      // date/time formatting will be Japanese
        wchar_t str[100];
        std::time_t t = std::time(nullptr);
        std::wcsftime(str, 100, L"%A %c", std::localtime(&t));
        std::wprintf(L"Number: %.2f\nDate: %Ls\n", 3.14, str);
    }

Output:

    Number: 3,14
    Date: 月曜日 2011年12月19日 18時04分40秒

### [edit] See also

setlocale | gets and sets the current C locale (function) [edit]
locale | set of polymorphic facets that encapsulate cultural differences (class) [edit]
C documentation for locale categories

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/locale/LC_categories&oldid=76276"