std::numpunct<CharT>:: thousands_sep, do_thousands_sep

Return value

The object of type char_type to use as the thousands separator. The standard specializations of std::numpunct return ',' and L ',' .

Example

#include <iostream>
#include <locale>
 
struct space_out : std::numpunct<char>
{
    char do_thousands_sep()   const { return ' '; }  // separate with spaces
    std::string do_grouping() const { return "\1"; } // groups of 1 digit
};
 
int main()
{
    std::cout << "default locale: " << 12345678 << '\n';
    std::cout.imbue(std::locale(std::cout.getloc(), new space_out));
    std::cout << "locale with modified numpunct: " << 12345678 << '\n';
}

default locale: 12345678
locale with modified numpunct: 1 2 3 4 5 6 7 8

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also