sameShape that returns true if the two
matrices have the same shape and false otherwise. A matrix is simply
a two-dimensional array of numbers. Two matrices have
the same shape if they have the same number of rows and corresponding rows
have the same number of columns.
public static boolean sameShape(int[][] matrixA, int[][] matrixB) {
A and B and
stores the result in matrix sum. Recall that matrix addition is done
element-wise, i.e. to find the value in row i, column j of A+B, just add
the value in row i, column j of A and the value in row i, column j of
B. You may assume that A and B have been
declared as int[][] and created.