M[0]
1 2 3
4 5 6
M[1]
1 2
3 4
5 6
M[2]
2 1 0
0 3 101
4 -1 2

1. Addition
2. Subtraction
3. Multiplication
4. Transpose
5. Reverse
6. Scalar Multiplication
7. Find Determinant
8. Find the Maximum Value
9. Exit

Addition: M[1] + M[0]
The two matrices have mismatched size. Operation abandonned. 

Addition: M[0] + M[0]
2 4 6
8 10 12

Addition: M[2] + M[2]
4 2 0
0 6 202
8 -2 4

Good-bye!