Namespaces
Variants
Views
Actions

std::showpos, std::noshowpos

From cppreference.com
< cpp‎ | io‎ | manip
Revision as of 22:04, 31 May 2013 by P12bot (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Defined in header <ios>
std::ios_base& showpos( std::ios_base& str );
(1)
std::ios_base& noshowpos( std::ios_base& str );
(2)

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.

Contents

[edit] Parameters

str - reference to I/O stream

[edit] Return value

str (reference to the stream after manipulation)

[edit] Example

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

Output:

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

[edit] See also

clears the specified ios_base flags
(function) [edit]
sets the specified ios_base flags
(function) [edit]