Originally posted by R Wall:
Using an array how would the add method be implemented?
I don't think I'm giving too much away if I suggest you use some square boxes drawn on a piece of paper to simulate the arrays. Write the numbers in the square boxes, one digit per box. Put one number above the other. Then, try to recall the way you add two numbers (the way you learned when you were about 8 years old but now do without thinking). Convert that into Java code.