%% Math 230, Spring 2011
%% Function for Problem 7 in Homework 10  

function [C,s] = SqrDiff(A,B);

% check if sizes of A and B are the same. If yes, proceed.
if size(A)==size(B)
  C = A.^2 - B.^2;
  s = sum(sum(C));
else
  disp('Sizes of A and B not same. Quitting ...');
end