std::numpunct::thousands_sep, do_thousands_sep - cppreference.com

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# std::numpunct::thousands_sep, do_thousands_sep

From cppreference.com
< cpp‎ | locale‎ | numpunct

Defined in header `<locale>` |  |
public: char_type thousands_sep() const; | (1) |
protected: virtual char_type do_thousands_sep() const; | (2) |

1) Public member function, calls the member function `do_thousands_sep` of the most derived class.
2) Returns the character to be used as the separator between digit groups when parsing or formatting integers and integral parts of floating-point values.

### [edit] Return value

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

### [edit] Example

Run this code

    #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';
    }

Output:

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

### [edit] See also

do_grouping [virtual] | provides the numbers of digits between each pair of thousands separators (virtual protected member function) [edit]

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