Potential Difference Among 3 Capacitors

%% Potential Difference Among 3 Capacitors
% Determining the potential difference from point A to B when there are two
% two capacitors in parallel and another in series.
% Notes and clarifications are at the bottom of code

C1 = input('The capacitance in C1\n');
C2 = input('The capacitance in C2\n');
C3 = input('The capacitance in C3\n');
a = input('Are you given the potential difference across C1 or one of the capacitors in parallel?\n');
switch a
    case 1
        V1 = input('The potential difference across C1\n');
        V2 = C1*V1/(C2+C3);
        V = V1 + V2;
    case 2
        V2 = input('The potential difference across C2 or C3\n');
        V1 = (C2+C3)*V2/C1;
        V = V1 + V2;
end
fprintf('The potential difference is %e V', V);

%{
This code has a different layout then some of the other codes because there
    are different ways to solve the equation depending on what is given
This code works under the assumption that C2 and C3 are in parallel
%}