Punch and Judy

%% Punch and Judy
% Determines the speed of a rocket seen on earth

% Constants
c = 3.00*10^8;                  % [m/s] Speed of Light

% Inputs and Variables
Vp = input('Speed punch sees\n');
Vj = input('Judy''s speed\n');

% Outputs and Equations
v = (Vp-Vj)/(1-Vp*Vj);
fprintf('Speed of the rocket seen by judy: %.3f\n',v)