std::showpos, std::noshowpos
From cppreference.com
C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Input/output library
Print functions (C++23)
Buffers
(C++23)
(C++98/26*)
(C++20)
Streams
Abstractions
File I/O
String I/O
Array I/O
(C++23)
(C++23)
(C++23)
(C++98/26*)
(C++98/26*)
(C++98/26*)
Synchronized Output
(C++20)
Types
Error category interface
(C++11)
(C++11)
Input/output manipulators
Floating-point formatting
(C++11)(C++11)
Integer formatting
Boolean formatting
Field width and fill control
Other formatting
showposnoshowpos
Whitespace processing
Output flushing
(C++20)(C++20)
Status flags manipulation
Time and money I/O
Quoted manipulator
(C++14)
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.
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 .
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 << "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