std::showpoint, std::noshowpoint
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showpointnoshowpoint
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Defined in header
<ios>
std::ios_base & showpoint( std::ios_base & str );
(1)
std::ios_base & noshowpoint( std::ios_base & str );
(2)
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 .
Contents
[edit] Parameters
str
-
reference to I/O stream
[edit] Return value
str (reference to the stream after manipulation).
[edit] Example
Run this code
#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