bit_or是C++中的内置函数,用于执行bitwise_or并在对其参数应用bitwise_or操作后返回结果。
头文件:
#include
模板类别:
template struct bit_or;
参数:它接受参数T ,该参数T是要由功能调用进行比较的参数的类型。
笔记:
- 此类的对象可用于标准算法,例如变换或累加。
- 成员函数(“运算符()”)返回其参数的bitwise_or。
我们必须包含库“ functional”和“ algorithm”以分别使用bit_or和transform()。
下面是C++中bit_or的图示:
问题1:
// C++ program to show the
// functionality of bit_or
#include // to include transform
#include // to include bit_or
#include
#include
using namespace std;
int main()
{
// declaring the values
int xyz[] = { -7, 2, 5, 100, 1029 };
int abc[] = { -4, 0, 5, 1, 1 };
int n = 5;
// defining results
int results[n];
// transform is used to apply
// bitwise_or on the arguments
transform(xyz, end(xyz), abc,
results, bit_or());
// printing the resulting array
cout << "Results:";
for (const int& x : results)
cout << ' ' << x;
return 0;
}
输出:
Results: -3 2 5 101 1029
Some points to Remember
- Bitwise_or of a number with zero results into the number itself.
- Bitwise_or of two same numbers is also equal to that number itself
- If the number is odd it’s bit_or with 1 will result into same number
- If the number is even it’s bit_or with 1 will always results into “number+1”
问题2:
// C++ program to show the
// functionality of bit_or
#include
#include
#include
#include
using namespace std;
int main()
{
// declaring the values
// in form of hexadecimals
int xyz[] = { 0, 1100 };
int abc[] = { 0xf, 0xf };
// defining results
int results[2];
// transform is used to apply
// bitwise_or on the arguments
transform(xyz, end(xyz), abc,
results, bit_or());
// printing the resulting array
cout << "Results:";
for (const int& x : results)
cout << ' ' << x;
return 0;
}
输出:
Results: 15 1103
参考: https : //en.cppreference.com/w/cpp/utility/functional/bit_or
要从最佳影片策划和实践问题去学习,检查了C++基础课程为基础,以先进的C++和C++ STL课程基础加上STL。要完成从学习语言到DS Algo等的更多准备工作,请参阅“完整面试准备课程” 。