Euclidian Clock

I chose this one randomly from Algorithmist
____________________________________________________________________
Question: Euclidian Clock
____________________________________________________________________

#include "iostream.h"
#include "math.h"
#include "iomanip.h"

int main() {
     double d, h, m, s, u;
     double hrs1, hrs2, pi = 2*acos(0), ans, area, r;
     cin >> d;
     for(int i = 1; i <= d; i++) {
             cin >> h>> m>> s >> u;
             hrs1 = h + m/60 + s/3600 + u/360000;
             cin >> h>> m>> s >> u;
             hrs2 = h + m/60 + s/3600 + u/360000;
             cin >> r;
             area = pi * r * r;
             ans = (hrs2 - hrs1)/12 * area;
             cout << i << ". " << fixed << setprecision(3) << ans << endl;
     }
     return 0;
}
____________________________________________________________________