#include <iostream>
#include <iomanip>   //for the iomanipulator setw
#include <cstdlib>
using namespace std;

int main()
{
	//Start with a 1.
	int mask {0x40000000};   //binary 01000000 00000000 00000000 00000000

	/*
	and keep halving it by shifting it farther and farther right:
	01000000 00000000 00000000 00000000
	00100000 00000000 00000000 00000000
	00010000 00000000 00000000 00000000
	00001000 00000000 00000000 00000000
	etc.
	*/

	for (int i {30}; i >= 0; --i) {
		cout << setw(2) << i << "  " << setw(10) << mask << "\n";
		mask >>= 1;   //means mask = mask >> 1;
	}

	return EXIT_SUCCESS;
}