examples/manual/bitset.cpp

/**************************************************************************
 *
 * bitset.cpp - Example program for bitset.
 *
 * $Id$
 *
 ***************************************************************************
 *
 * Licensed to the Apache Software  Foundation (ASF) under one or more
 * contributor  license agreements.  See  the NOTICE  file distributed
 * with  this  work  for  additional information  regarding  copyright
 * ownership.   The ASF  licenses this  file to  you under  the Apache
 * License, Version  2.0 (the  "License"); you may  not use  this file
 * except in  compliance with the License.   You may obtain  a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the  License is distributed on an  "AS IS" BASIS,
 * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
 * implied.   See  the License  for  the  specific language  governing
 * permissions and limitations under the License.
 *
 * Copyright 1994-2006 Rogue Wave Software.
 * 
 **************************************************************************/

#include <bitset>     // for bitset
#include <iostream>   // for cout, endl

#include <examples.h>

int main ()
{
    // Construct a bitset with 40 elements all initialized to 0.
    std::bitset<40> b;

    // Bitwise OR the bitset with 5.
    b |= 5;

    // Write bitset to the standard output.
    std::cout << "         4....:....3....:....2....:....1....:....0\n"
              << "b = 5:    " << b << '\n';

    // Invert the bitset.
    b = ~b;

    std::cout << "b = ~b:   " << b << '\n'
              << "b <<= " << b.count () << ": ";

    // Shift the bitset left by the number of bits set.
    b <<= b.count ();

    // Convert it to a string and write it out again.
    std::cout << b.to_string () << '\n';

    // Return 0 on success.
    return !(1 == b.count () && 1UL == (b >> (b.size () - 1)).to_ulong ());
}