有符号数和无符号数的移位操作

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/*C provides six operators (&, |, ^, <<, >>,~)for bit manipulation;
 * these may only be applied to integral operands, that is, char, short, int,
 * and long,whether signed or unsigned.
 */

#include <iostream>
using namespace std;

int main() {
    cout << "!!!Hello World!!!" << endl; // prints !!!Hello

    /*二进制输出*/
    cout.setf(ios::hex,ios::basefield);

    int i = 0x80000000;
    cout << "i = " << i <<endl;
    i = i >> 1;
    cout << "after move i = " << i << endl;

    unsigned int ui = 0x80000000;
    cout << "ui = " << ui <<endl;
    ui = ui >> 1;
    cout << "after move ui = " << ui << endl;

    return 0;
}
//right shift
//!!!Hello
//i = 80000000
//after move i = c0000000
//ui = 80000000
//after move ui = 40000000*/

//left shift
//!!!Hello
//i = 80000000
//after move i = 0
//ui = 80000000
//after move ui = 0