boolalpha
manipulator function
<ios>
ios_base& boolalpha ( ios_base& str );
Alphanumerical bool values
Sets the boolalpha format flag for the str stream.
When the boolalpha format flag is set, bool values are insterted/extracted as their names: true and false instead of integral values.
This flag can be unset with the noboolalpha 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
A reference to the stream object.
Example
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// modify boolalpha flag
#include <iostream>
using namespace std;
int main () {
bool b;
b=true;
cout << boolalpha << b << endl;
cout << noboolalpha << b << endl;
return 0;
}
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The execution of this example displays something similar to:
See also
| noboolalpha | No alphanumerical bool values (manipulator function) |
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