std::numpunct::decimal_point, do_decimal_point

Defined in header `<locale>`
public: char_type decimal_point() const;	(1)
protected: virtual char_type do_decimal_point() const;	(2)

1) Public member function, calls the member function do_decimal_point of the most derived class.

2) Returns the character to be used as the decimal separator between integer and fractional parts.

[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 slash : std::numpunct<char> {
    char do_decimal_point()   const { return '/'; }  // separate with slash
};
 
int main()
{
    std::cout.precision(10);
    std::cout << "default locale: " << 1234.5678 << '\n';
    std::cout.imbue(std::locale(std::cout.getloc(), new slash));
    std::cout << "locale with modified numpunct: " << 1234.5678 << '\n';
}

Output:

default locale: 1234.5678
locale with modified numpunct: 1234/5678

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)
Filesystem library (C++17)
Technical Specifications

Member functions
numpunct::numpunct
numpunct::~numpunct
numpunct::decimal_pointnumpunct::do_decimal_point
numpunct::thousands_sepnumpunct::do_thousands_sep
numpunct::groupingnumpunct::do_grouping
numpunct::truenamenumpunct::do_truenamenumpunct::falsenamenumpunct::do_falsename