The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <bitset>
#include <iostream>
using namespace std;
int main()
{
/* enumeration type for the bits
* - each bit represents a color
*/
enum Color { red, yellow, green, blue, white, black, //...,
numColors };
// create bitset for all bits/colors
bitset<numColors> usedColors;
// set bits for two colors
usedColors.set(red);
usedColors.set(blue);
// print some bitset data
cout << "bitfield of used colors: " << usedColors
<< endl;
cout << "number of used colors: " << usedColors.count()
<< endl;
cout << "bitfield of unused colors: " << ~usedColors
<< endl;
// if any color is used
if (usedColors.any()) {
// loop over all colors
for (int c = 0; c < numColors; ++c) {
// if the actual color is used
if (usedColors[(Color)c]) {
//...
}
}
}
}