std::showpos, std::noshowpos

std::ios_base& showpos( std::ios_base& str );

std::ios_base& noshowpos( std::ios_base& str );

Enables or disables the display of the plus sign '+' in non-negative integer output. Has no effect on input.

1) enables the showpos flag in the stream str as if by calling str.setf(std::ios_base::showpos).

2) disables the showpos flag in the stream str as if by calling str.unsetf(std::ios_base::showpos).

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

Parameters

Return value

str (reference to the stream after manipulation).

Example

#include <iostream>
int main()
{
        std::cout << "showpos: " << std::showpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n'
                  << "noshowpos: " << std::noshowpos << 42 << ' ' << 3.14 << ' ' << 0 << '\n';
}

showpos: +42 +3.14 +0
noshowpos: 42 3.14 0

See also