CS 112 Lab 7: push() Exception Hint

To throw an exception when the stack is full, the push(const Item& it) method should behave as follows:

   If I am full {
      throw a StackException whose method is "push()" and whose message is "stack is full".
   }
   a. Store it into the entry of myArray whose index is mySize.
   b. Add 1 to mySize.