/* The following code example is taken from the book
* "The C++ Standard Library - A Tutorial and Reference"
* by Nicolai M. Josuttis, Addison-Wesley, 1999
*
* (C) Copyright Nicolai M. Josuttis 1999.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/
#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]) {
//...
}
}
}
}
/*
bitfield of used colors: 001001
number of used colors: 2
bitfield of unused colors: 110110
*/
Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10185
Categories:Programming Code Examples, C++, Bitset
Tags:C++Bitset
Post Data:2017-01-02 16:04:23
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