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
.
str | - | reference to I/O stream |
str
(reference to the stream after manipulation).
#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
clears the specified ios_base flags (function) |
|
sets the specified ios_base flags (function) |
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