BitMagic-C++: sample1.cpp Source File

BitMagic-C++

sample1.cpp
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1 /*
2 Copyright(c) 2002-2017 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)
3
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
7
8 http://www.apache.org/licenses/LICENSE-2.0
9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15
16 For more information please visit: http://bitmagic.io
17 */
18
19 /** \example sample1.cpp
20 Example how to use bvector<> to set bits and then retrieve indexes of ON bits
21
22
23 \sa bm::bvector<>::get_next()
24 \sa bm::bvector<>::get_first()
25 \sa bm::bvector<>::set()
26 \sa bm::bvector<>::count()
27 \sa bm::bvector<>::clear()
28 */
29
30 /*! \file sample1.cpp
31 \brief Example: bvector<> set bits and then retrieve indexes of ON bits
32 */
33 #include <iostream>
34 #include "bm.h"
35
36 using namespace std;
37
38 int main(void)
39 {
40 try
41 {
42 bm::bvector<> bv { 1, 2, 3 }; // Bitvector variable declaration with init list
43
44 cout << "1. bitcount: " << bv.count() << endl;
45
46 // Set some bits.
47
48 bv.set(10);
49 bv.set(100);
50 bv.set(1000000);
51
52 // New bitvector's count.
53
54 cout << "2. bitcount: " << bv.count() << endl;
55
56
57 // Print the bitvector.
58
59 auto value = bv.get_first();
60 do
61 {
62 cout << value;
63 value = bv.get_next(value);
64 if (value)
65 {
66 cout << ",";
67 }
68 else
69 {
70 break;
71 }
72 } while(1);
73
74 cout << endl;
75
76 bv.clear(); // Clean up.
77
78 cout << "3. bitcount: " << bv.count() << endl;
79
80 // We also can use operators to set-clear bits;
81
82 bv[10] = true;
83 bv[100] = true;
84 bv[10000] = true;
85
86 cout << "4. bitcount: " << bv.count() << endl;
87
88 if (bv[10])
89 {
90 bv[10] = false;
91 }
92
93 cout << "5. bitcount: " << bv.count() << endl;
94 }
95 catch(std::exception& ex)
96 {
97 std::cerr << ex.what() << std::endl;
98 return 1;
99 }
100
101
102 return 0;
103 }
104
main
int main(void)
Definition: sample1.cpp:38
bm::bvector<>
bm::bvector::count
size_type count() const BMNOEXCEPT
population cout (count of ON bits)
Definition: bm.h:2194
bm.h
Compressed bit-vector bvector<> container, set algebraic methods, traversal iterators.