// This code illustrates formatting with iostreams.
// It should display something like this:
//
// Decimal     Octal       Hex   Squared      Root
//       1         1         1         1     1.000
//       2         2         2         4     1.414
//       4         4         4        16     2.000
//       8        10         8        64     2.828
//      16        20        10       256     4.000
//      32        40        20      1024     5.657
//      64       100        40      4096     8.000
//     128       200        80     16384    11.314
//     256       400       100     65536    16.000
//     512      1000       200    262144    22.627
//    1024      2000       400   1048576    32.000

#include <iostream>			// cout
#include <iomanip>			// setfill, setprecision, setw
#include <cmath>			// sqrt

using namespace std;

int main() {
    constexpr int width=10;		// width of table columns

    cout << fixed << setprecision(3);	// show floating-point as x.yyy
    // cout << showbase;		// leading 0/0x for octal/hex
    // cout << left;			// left-justify: value on the left
    // cout << setfill('*');		// Use this fill character with setw
    // cout << scientific;		// show floating-point as x.yyyezz

    cout << setw(width) << "Decimal"
	 << setw(width) << "Octal"
	 << setw(width) << "Hex"
	 << setw(width) << "Squared"
	 << setw(width) << "Root"
	 << '\n';

    for (int i=1; i<=1024; i*=2)
	cout << setw(width) << dec << i
	     << setw(width) << oct << i
	     << setw(width) << hex << i
	     << setw(width) << dec << i*i
	     << setw(width) << sqrt(i)
	     << '\n';
}