#include <iostream>
#include <cmath>  // Needed for log()
using namespace std;

int main()
{
    int n;
    double H = 0.0;
    
    cout << "Enter a positive integer\n";
    cin >> n;
    cout << endl;
    
    for ( int i = 1; i <= n; i++ )
        H += 1.0 / double( i );
        
    cout << "H(" << n << ") = " << H << endl;
    cout << "Your harmonic number should be a bit greater than " << log( n + 1 );
        
    cout << "\n\n"; system( "PAUSE" );
    return( 0 );
}