std::showpos, std::noshowpos - cppreference.com (original) (raw)

| Defined in header | | | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --- | | | 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.

[edit] Parameters

[edit] Return value

str (reference to the stream after manipulation).

[edit] Example

#include   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

[edit] See also