ios_base& noboolalpha ( ios_base& str );

<ios>

No alphanumerical bool values

Clears the boolalpha format flag for the str stream.

When the boolalpha format flag is not set, bool values are insterted/extracted as integral values (0 and 1) instead of their bool names: true and false.

This flag can be set using the boolalpha manipulator.

The boolalpha 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 boolalpha flag
#include <iostream>
using namespace std;

int main () {
  bool b;
  b=true;
  cout << noboolalpha << b << endl;
  cout << boolalpha << b << endl;
  return 0;
}

The execution of this example displays something similar to:

1
true

See also