function [] = task_three(a, b, c)

    input(1,:)= {'a', 'b', 'c'};
    if nargin == 0
        a = randn();
        b = randn();
        c = randn();
        input(2,:) = {num2str(a),  num2str(b),  num2str(c)};
    end
    if nargin == 1
        b = randn();
        c = randn();
        input(2,:) = {'',  num2str(b), num2str(c)};
    end
    if nargin == 2
        c = randn();
        input(2,:) = {'', '', num2str(c)};
    end
    if nargin == 3
        input = {};
    end
    if nargin > 3
        error('To many argumnts to parse')
    end

    delta = calculate_delta(a, b, c);
    roots = calculate_roots(a, b, delta);

    disp(['Delta: ' , num2str(delta)])
    disp(['Roots: ', num2str(length(roots))])
    for i=1:length(roots)
        fprintf('X%s: %s\n',  num2str(i),  num2str(roots(1,i)));
    end
    for i=1:length(input)
        if ~strcmp(input(2, i), '')
            fprintf('%s: %s\n', input{1, i}, input{2, i})
        end
    end

end

function delta = calculate_delta(a, b, c)
	delta = (b^2) - (4*a*c);
end

function roots = calculate_roots(a, b, delta)

    if delta < 0
        roots = [];
        % not real roots
    end
    if delta == 0
        roots = -b / 2*a;
    end
    if delta > 0
        x1 = (-b + sqrt(delta))/ (2*a);
        x2 = (-b - sqrt(delta))/ (2*a);
        roots = [x1,x2];
    end
end