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std::showpos, std::noshowpos

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< cpp‎ | io‎ | manip
Revision as of 16:53, 2 November 2012 by P12bot (Talk | contribs)

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<td>
Defined in header <ios>
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<td></td> <td></td> <tr class="t-dcl ">

<td >
std::ios_base& showpos( std::ios_base& str );
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<td > (1) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">

<td >
std::ios_base& noshowpos( std::ios_base& str );
</td>

<td > (2) </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end

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

Parameters

str - reference to I/O stream

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';
}

Output:

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

See also

Template:cpp/io/manip/dcl list resetiosflagsTemplate:cpp/io/manip/dcl list setiosflags