std::showpoint, std::noshowpoint

< cpp‎ | io‎ | manip
Input/output manipulators
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Defined in header <ios>
std::ios_base& showpoint( std::ios_base& str );
std::ios_base& noshowpoint( std::ios_base& str );

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.

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.


[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 << "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

[edit] See also

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