int main() const double G(6.67 pow (10, -11)): const double mass (50); const double meters to miles (6.214pow(10,-4)); double g meters earth(8.8), g meters mars(8.0), g meters jupiter (8.8) double force gravity earth(0.0), force gravity mars (0.), force gravity jupiter (8.8); double g miles earth(8.), g miles mars(8.8), g miles jupiter(6.8): g meters earth (G 5.98 pw(10.0,24.0))/po(6.38pow(10.0,6.0), 2.0); g meters mars (G 6.42 pow(10.0, 23.0))/pow(3.38 pow (10.0, 6.0), 2.8) g meters Jupiter (G 1.901 pow(1., 27.0))/pow(6.98 pow(19.9, 7.9), 2.) force-gravity, earth mass * g-meters-earth; force gravity mars mass g meters mars; force gravity_jupiter mass g.meters jupiter: g miles earth g meters earth meters to miles; g miles mars g meters mars meters to miles: g-miles-jupiter = g.-meters-jupiter * meters-to-niles; cout