lconv
From cppreference.com
| Defined in header <locale.h>
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| struct lconv; |
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The struct lconv contains numeric and monetary formatting rules as defined by a C locale. Objects of this struct may be obtained with localeconv. The members of lconv are values of type char and of type char*. Each char* member except decimal_point may be pointing at a null character (that is, at an empty C-string). The members of type char are all non-negative numbers, any of which may be CHAR_MAX if the corresponding value is not available in the current C locale.
Member objects
Non-monetary numeric formatting parameters
| char* decimal_point |
the character used as the decimal point (public member object) |
| char* thousands_sep |
the character used to separate groups of digits before the decimal point (public member object) |
| char* grouping |
a string whose elements indicate the sizes of digit groups (public member object) |
Monetary numeric formatting parameters
| char* mon_decimal_point |
the character used as the decimal point (public member object) |
| char* mon_thousands_sep |
the character used to separate groups of digits before the decimal point (public member object) |
| char* mon_grouping |
a string whose elements indicate the sizes of digit groups (public member object) |
| char* positive_sign |
a string used to indicate non-negative monetary quantity (public member object) |
| char* negative_sign |
a string used to indicate negative monetary quantity (public member object) |
Local monetary numeric formatting parameters
| char* currency_symbol |
the symbol used for currency in the current C locale (public member object) |
| char frac_digits |
the number of digits after the decimal point to display in a monetary quantity (public member object) |
| char p_cs_precedes |
1 if currency_symbol is placed before non-negative value, 0 if after (public member object) |
| char n_cs_precedes |
1 if currency_symbol is placed before negative value, 0 if after (public member object) |
| char p_sep_by_space |
indicates the separation of currency_symbol, positive_sign, and the non-negative monetary value (public member object) |
| char n_sep_by_space |
indicates the separation of currency_symbol, negative_sign, and the negative monetary value (public member object) |
| char p_sign_posn |
indicates the position of positive_sign in a non-negative monetary value (public member object) |
| char n_sign_posn |
indicates the position of negative_sign in a negative monetary value (public member object) |
International monetary numeric formatting parameters
| char* int_curr_symbol |
the string used as international currency name in the current C locale (public member object) |
| char int_frac_digits |
the number of digits after the decimal point to display in an international monetary quantity (public member object) |
| char int_p_cs_precedes (C99) |
1 if int_curr_symbol is placed before non-negative international monetary value, 0 if after (public member object) |
| char int_n_cs_precedes (C99) |
1 if int_curr_symbol is placed before negative international monetary value, 0 if after (public member object) |
| char int_p_sep_by_space (C99) |
indicates the separation of int_curr_symbol, positive_sign, and the non-negative international monetary value (public member object) |
| char int_n_sep_by_space (C99) |
indicates the separation of int_curr_symbol, negative_sign, and the negative international monetary value (public member object) |
| char int_p_sign_posn (C99) |
indicates the position of positive_sign in a non-negative international monetary value (public member object) |
| char int_n_sign_posn (C99) |
indicates the position of negative_sign in a negative international monetary value (public member object) |
The characters of the C-strings pointed to by grouping and mon_grouping are interpreted according to their numeric values. When the terminating '\0' is encountered, the last value seen is assumed to repeat for the remainder of digits. If CHAR_MAX is encountered, no further digits are grouped. The typical grouping of three digits at a time is "\003".
The values of p_sep_by_space, n_sep_by_space, int_p_sep_by_space, int_n_sep_by_space are interpreted as follows:
| 0 | no space separates the currency symbol and the value |
| 1 | sign sticks to the currency symbol, value is separated by a space |
| 2 | sign sticks to the value. Currency symbol is separated by a space |
The values of p_sign_posn, n_sign_posn, int_p_sign_posn, int_n_sign_posn are interpreted as follows:
| 0 | parentheses around the value and the currency symbol are used to represent the sign |
| 1 | sign before the value and the currency symbol |
| 2 | sign after the value and the currency symbol |
| 3 | sign before the currency symbol |
| 4 | sign after the currency symbol |
Example
Run this code
#include <locale.h> #include <stdio.h> int main(void) { setlocale(LC_ALL, "ja_JP.UTF-8"); struct lconv *lc = localeconv(); printf("Japanese currency symbol: %s(%s)\n", lc->currency_symbol, lc->int_curr_symbol); }
Possible output:
Japanese currency symbol: ￥(JPY )
References
- C23 standard (ISO/IEC 9899:2024):
- 7.11/2 Localization <locale.h> (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.11/2 Localization <locale.h> (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.11/2 Localization <locale.h> (p: 223)
- C99 standard (ISO/IEC 9899:1999):
- 7.11/2 Localization <locale.h> (p: 204)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.4 LOCALIZATION <locale.h>
See also
| queries numeric and monetary formatting details of the current locale (function) | |
| C++ documentation for lconv
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