Huge Sell on Popular Electronics
/* 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
*/
Huge Sell on Popular Electronics
/* 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>
#include <string>
#include <limits>
using namespace std;
int main()
{
/* print some numbers in binary representation
*/
cout << "267 as binary short: "
<< bitset<numeric_limits<unsigned short>::digits>(267)
<< endl;
cout << "267 as binary long: "
<< bitset<numeric_limits<unsigned long>::digits>(267)
<< endl;
cout << "10,000,000 with 24 bits: "
<< bitset<24>(1e7) << endl;
/* transform binary representation into integral number
*/
cout << "\"1000101011\" as number: "
<< bitset<100>(string("1000101011")).to_ulong() << endl;
}
/*
267 as binary short: 0000000100001011
267 as binary long: 00000000000000000000000100001011
10,000,000 with 24 bits: 100110001001011010000000
1000101011" as number: 555
*/
// create a bitset that is 8 bits long bitset<8> bs; // display that bitset for( int i = (int) bs.size()-1; i >= 0; i-- ) { cout << bs[i] << " "; } cout << endl; // create a bitset out of a number bitset<8> bs2( (long) 131 ); // display that bitset, too for( int i = (int) bs2.size()-1; i >= 0; i-- ) { cout << bs2[i] << " "; } cout << endl;
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