// width.cpp -- use the width method
#include <iostream>
using namespace std;

int main()
{
    int w = cout.width(30);
    cout << "default field width = " << w << ":\n";

    cout.width(5);
    cout << "N" <<':';
    cout.width(8);
    cout << "N * N" << ":\n";

    for (long i = 1; i <= 100; i *= 10)
    {
        cout.width(5);
        cout << i <<':';
        cout.width(8);
        cout << i * i << ":\n";
    }

    return 0; 
}