This locale is designated as “C” or LC_C_C. It is the default locale when the program starts (with one exception: if the main routine is a C V1.0 object, then “V1CTYPE” applies, see "Compatible locales V1CTYPE and V2CTYPE").
The C locale has the following effects in the various categories:
LC_CTYPE
The classification corresponds to the EBCDIC definition of the individual characters (EBCDIC.DF.03, international version).
LC_NUMERIC
The information defined in localeconv has the following values:
decimal_point | ’.’ |
thousands_sep | "" |
grouping | "" |
LC_MONETARY
The information defined in localeconv has the following values:
int_curr_symbol | "" |
currency_symbol | "" |
mon_decimal_point | "" |
mon_thousands_sep | "" |
mon_grouping | "" |
positive_sign | "" |
negative_sign | "" |
int_frac_digits | CHAR_MAX (= 255) |
frac_digits | CHAR_MAX |
p_cs_precedes | CHAR_MAX |
n_cs_precedes | CHAR_MAX |
p_sep_by_space | CHAR_MAX |
n_sep_by_space | CHAR_MAX |
p_sign_pos | CHAR_MAX |
n_sign_pos | CHAR_MAX |
LC_TIME
English is used for the days of the week and the months of the year. The formats for date and time comply with the standard conventions for English-speaking countries.
LC_COLLATE
The category LC_COLLATE affects the sorting sequence for the functions strcoll, strxfrm, wcscoll and wcsxfrm. In the default location "C", the sorting sequence complies with the definition in the XPG4 standard, in which the sequence depends on the ASCII value of the characters (see following table).
Sort sequence in accordance with the XPG4 standard (ASCII)
\0 | / | D | Y | n |
\t | 0 | E | Z | o |
\n | 1 | F | [ | p |
\v | 2 | G | \ | q |
\f | 3 | H | ] | r |
\r | 4 | I | ^ | s |
'BLANK' | 5 | J | _ | t |
! | 6 | K | ` | u |
" | 7 | L | a | v |
# | 8 | M | b | w |
$ | 9 | N | c | x |
% | : | O | d | y |
& | ; | P | e | z |
' | < | Q | f | { |
( | = | R | g | | |
) | > | S | h | } |
* | ? | T | i | ~ |
+ | @ | U | j | |
, | A | V | k | |
- | B | W | l | |
. | C | X | m |