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