BitMagic-C++
samples
bvsample01
sample1.cpp
Go to the documentation of this file.
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/*
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Copyright(c) 2002-2017 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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For more information please visit: http://bitmagic.io
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*/
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/** \example sample1.cpp
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Example how to use bvector<> to set bits and then retrieve indexes of ON bits
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\sa bm::bvector<>::get_next()
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\sa bm::bvector<>::get_first()
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\sa bm::bvector<>::set()
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\sa bm::bvector<>::count()
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\sa bm::bvector<>::clear()
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*/
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/*! \file sample1.cpp
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\brief Example: bvector<> set bits and then retrieve indexes of ON bits
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*/
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#include <iostream>
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#include "
bm.h
"
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using namespace
std;
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int
main
(
void
)
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{
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try
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{
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bm::bvector<>
bv { 1, 2, 3 };
// Bitvector variable declaration with init list
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cout <<
"1. bitcount: "
<< bv.
count
() << endl;
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// Set some bits.
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bv.set(10);
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bv.set(100);
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bv.set(1000000);
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// New bitvector's count.
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cout <<
"2. bitcount: "
<< bv.count() << endl;
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// Print the bitvector.
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auto
value = bv.get_first();
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do
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{
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cout << value;
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value = bv.get_next(value);
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if
(value)
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{
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cout <<
","
;
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}
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else
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{
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break
;
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}
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}
while
(1);
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cout << endl;
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bv.clear();
// Clean up.
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cout <<
"3. bitcount: "
<< bv.count() << endl;
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// We also can use operators to set-clear bits;
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bv[10] =
true
;
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bv[100] =
true
;
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bv[10000] =
true
;
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cout <<
"4. bitcount: "
<< bv.count() << endl;
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if
(bv[10])
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{
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bv[10] =
false
;
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}
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cout <<
"5. bitcount: "
<< bv.count() << endl;
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}
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catch
(std::exception& ex)
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{
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std::cerr << ex.what() << std::endl;
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return
1;
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}
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return
0;
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}
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bm::bvector::count
size_type count() const
population cout (count of ON bits)
Definition:
bm.h:2487
main
int main(void)
Definition:
sample1.cpp:38
bm::bvector<>
bm.h
Compressed bit-vector bvector<> container, set algebraic methods, traversal iterators.
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