Difference between revisions of "cpp/locale/LC categories"

Revision as of 19:56, 2 November 2012

Template:ddcl list begin <tr class="t-dsc-header">

<td>

Defined in header <clocale>

</td>

#define LC_ALL /*implementation defined*/

</td>

#define LC_COLLATE /*implementation defined*/

</td>

#define LC_CTYPE /*implementation defined*/

</td>

#define LC_MONETARY /*implementation defined*/

</td>

#define LC_NUMERIC /*implementation defined*/

</td>

#define LC_TIME /*implementation defined*/

</td>

<td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end

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 and the GNU C library additionally defines LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEASUREMENT, and LC_IDENTIFICATION.

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(NULL);
    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

@@ Line 65: / Line 65: @@
 {{dcl list template | cpp/locale/dcl list locale}}
 {{dcl list end}}
+[[de:cpp/locale/LC categories]]
+[[es:cpp/locale/LC categories]]
+[[fr:cpp/locale/LC categories]]
+[[it:cpp/locale/LC categories]]
+[[ja:cpp/locale/LC categories]]
+[[pt:cpp/locale/LC categories]]
+[[ru:cpp/locale/LC categories]]
+[[zh:cpp/locale/LC categories]]

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Execution support library (C++26)
Technical specifications
Symbols index
External libraries

Character conversions
toupper
tolower
String and stream conversions
wstring_convert (C++11/17/26*)
wbuffer_convert (C++11/17/26*)

cppreference.com

Namespaces

Variants

Views

Actions

Difference between revisions of "cpp/locale/LC categories"

Revision as of 19:56, 2 November 2012

Example

See also

Navigation

Toolbox