My friend needs a program that will:
1. Ask the user for the size of the matrix. The choices are 2x2 or 3x3.
2. Ask the user for the operation to perform. The choices are addition or subtraction.
3. Let the user input the numbers for the first matrix.
4. Let the user input the numbers for the second matrix.
5. Perform the chosen operation on the given matrices.
6. Show the solution in matrix form.
7. Ask the user if he wants to do matrix calculation again. If yes, proceed to
item #1. If no, exit the math engine.