位运算（C++）

C++输出十六进制

#include<iostream>
#include<iomanip>
using namespace std;

int main()
{
    int a = 60;
    int b = 13;
    int c =  a &b;
    cout << "a : hex "<<hex << a << endl;
    cout << "b : hex "<<hex << b << endl;
    cout << "c : hex "<<hex << c << endl;
    return 0;
}

运行结果：

exbot@ubuntu:~/wangqinghe/C++/enum$ ./mybyte

a : hex 3c

b : hex d

c : hex c

C++输出二进制：

#include<iostream>
#include<bitset>
using namespace std;
const int num = 8; //输出位数控制
int main()
{
    int n_max = 42;
    cout << (bitset<num>)n_max << endl;
    return 0;
}

运行结果：

exbot@ubuntu:~/wangqinghe/C++/enum$ ./binbyte

00101010

位计算：

#include<iostream>
#include<bitset>
using namespace std;
const int num = 8;

int main()
{
    int a = 60;
    int b = 13;
    int c = 0;
     cout << "a = " << a << endl; 
    cout << "b = " << b << endl;

    c = a & b;
    cout << "& AND" << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "b : " << (bitset<num>)b << endl;
    cout << "c : " << (bitset<num>)c << endl;

    c = a | b;
    cout << "| OR" << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "b : " << (bitset<num>)b << endl;
    cout << "c : " << (bitset<num>)c << endl;

    c = a ^ b;
    cout << "^ XOR" << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "b : " << (bitset<num>)b << endl;
    cout << "c : " << (bitset<num>)c << endl;

    c = (~a);
    cout << "~ Reverse" << endl;
    cout << "a = " << a << endl;
    cout << "c = " << c << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "c : " << (bitset<num>)c << endl;

    c = a << 2;
    cout << "<< shift left" << endl;
    cout << "a = " << a << endl;
    cout << "c = " << c << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "c : " << (bitset<num>)c << endl;

    c = a >> 2;
    cout << "<< shift right" << endl;
    cout << "a = " << a << endl;
    cout << "c = " << c << endl;
    cout << "a : " << (bitset<num>)a << endl;
    cout << "c : " << (bitset<num>)c << endl;
    return 0;
}

与预算：有0 为0，双1为1

或运算：有1为1，双0 为0

异或运算：相同为0，不同为1

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