/*  A new feature in this program is the field width specifier setw().
setw(n) sets the field width to size n and right justifies the content 
of the field.  This affects the next operation only.
setw() requires <iomanip>. */

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

int main()
{
    int n = 1, Tn = 1;
    
    cout << " Triangular Numbers\n";
    cout << " ------------------\n";
    
    while ( Tn < 99 ) {
        cout << " n = " << setw(2) << n;
        cout << "   T(n) = " << setw(2) << Tn << endl;
        Tn += ++n;
    }
    
    cout << "\n\n"; system( "PAUSE" );
    return( 0 );
}