std:: showpoint, std:: noshowpoint

Enables or disables the unconditional inclusion of the decimal point character in floating-point output. Has no effect on input.

This is an I/O manipulator, it may be called with an expression such as out << std :: showpoint for any out of type std::basic_ostream or with an expression such as in >> std :: showpoint for any in of type std::basic_istream .

The character to use as decimal point character is determined by the numpunct facet of the locale imbued in the stream at the time of output, as described in std::num_put::put .

Parameters

Return value

str (reference to the stream after manipulation).

Example

#include <iostream>
 
int main()
{
    std::cout << "1.0 with showpoint: " << std::showpoint << 1.0 << '\n'
              << "1.0 with noshowpoint: " << std::noshowpoint << 1.0 << '\n';
}

1.0 with showpoint: 1.00000
1.0 with noshowpoint: 1

See also