std::lconv - cppreference.com (original) (raw)
The class std::lconv contains numeric and monetary formatting rules as defined by a C locale. Objects of this struct may be obtained with std::localeconv. The members of std::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.
Contents
[edit] Member objects
[edit] Non-monetary numeric formatting parameters
| | the character used as the decimal point (public member object) | | -------------------------------------------------------------------------------------------------- | | | the character used to separate groups of digits before the decimal point (public member object) | | | a string whose elements indicate the sizes of digit groups (public member object) |
[edit] Monetary numeric formatting parameters
| | the character used as the decimal point (public member object) | | -------------------------------------------------------------------------------------------------- | | | the character used to separate groups of digits before the decimal point (public member object) | | | a string whose elements indicate the sizes of digit groups (public member object) | | | a string used to indicate non-negative monetary quantity (public member object) | | | a string used to indicate negative monetary quantity (public member object) |
[edit] 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) |
[edit] 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(C++11) | 1 if int_curr_symbol is placed before non-negative international monetary value, 0 if after (public member object) |
| char int_n_cs_precedes(C++11) | 1 if int_curr_symboll is placed before negative international monetary value, 0 if after (public member object) |
| char int_p_sep_by_space(C++11) | 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(C++11) | indicates the separation of int_curr_symbol, negative_sign, and the negative international monetary value (public member object) |
| char int_p_sign_posn(C++11) | indicates the position of positive_sign in a non-negative international monetary value (public member object) |
| char int_n_sign_posn(C++11) | 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 |
[edit] Example
#include #include int main() { std::setlocale(LC_ALL, "ja_JP.UTF-8"); std::lconv* lc = std::localeconv(); std::cout << "Japanese currency symbol: " << lc->currency_symbol << '(' << lc->int_curr_symbol << ")\n"; }
Output:
Japanese currency symbol: ￥(JPY )