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std::showpoint, std::noshowpoint

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< cpp‎ | io‎ | manip
Revision as of 15:54, 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& showpoint( std::ios_base& str );
</td>

<td > (1) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">

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

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

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

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

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

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.

Contents

Parameters

str - reference to I/O stream

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';
}

Output:

1.0 with showpoint: 1.00000
1.0 with noshowpoint: 1

See also

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