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std::moneypunct::frac_digits, do_frac_digits

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< cpp‎ | locale‎ | moneypunct
Revision as of 15:55, 7 August 2013 by Cubbi (Talk | contribs)

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Defined in header <locale>
public:
int frac_digits() const;
(1)
protected:
int virtual do_thousands_sep() const;
(2)
1) Public member function, calls the member function do_frac_digits of the most derived class.
2) Returns the number of digits to be displayed after the decimal point when printing monetary values

[edit] Return value

The number of digits to be displayed after the decimal point. In common U.S. locales, this is the value 2.

[edit] Example

#include <locale>
#include <iostream>
#include <iomanip>
#include <iterator>
struct space_out : std::moneypunct<char> {
    pattern do_pos_format()      const { return { {value, none, none, none} };}
    int do_frac_digits()         const { return 0; }
    char_type do_thousands_sep() const { return ' ';}
    string_type do_grouping()    const { return "\002";}
};
int main()
{
    std::cout.imbue(std::locale("en_US.UTF-8"));
    std::cout << "american locale: " << std::showbase
              << std::put_money(12345678.0)<< '\n';
 
    std::cout.imbue(std::locale(std::cout.getloc(), new space_out));
    std::cout << "locale with modified moneypunct: "
              << std::put_money(12345678.0)<< '\n';
}

Output:

american locale: $123,456.78
locale with modified moneypunct: 12 34 56 78

[edit] See also

provides the character to use as thousands separator
(virtual protected member function) [edit]
provides the character to use as decimal point
(virtual protected member function) [edit]