ios_base& showpos ( ios_base& str );

<ios>

Show positive signs

Sets the showpos format flag for the str stream.

When the showpos format flag is set, a plus sign (+) precedes every non-negative numerical value insterted into the stream, including zeros.

This flag can be unset with the noshowpos manipulator.

The showpos flag is not set in standard streams on initialization.

Parameters

str

Stream object where to apply.
Because this function is a manipulator, it is designed to be used alone with no arguments in conjunction with the insertion (<<) and extraction (>>) operations on streams (see example below).

Return Value

Example

// modify showpoint flag
#include <iostream>
using namespace std;

int main () {
  signed int p, z, n;
  p=1;
  z=0;
  n=-1;
  cout <<   showpos << p << '\t' << z << '\t' << n << endl;
  cout << noshowpos << p << '\t' << z << '\t' << n << endl;
  return 0;
}

The execution of this example displays something similar to:

+1      +0      -1
1       0       -1

See also