Size of Moon's Image

%% Size of Moon's Image
% Determines teh diameter of the moon's image

% Inputs and Variables
f = input('Focal Point\n');
dmoon = input('Diameter of the moon\n');
d = input('Distance from Earth to the Moon\n');

% Outputs and Equations
hprime = f*dmoon/d;
fprintf('The image diameter is: %.3e m\n', hprime)