Chapter 17, Problem 17E

Program Plan Intro

A method “combineWith()”

Program plan:

• Define the method “combineWith()”,
  • Create object for “IntTree”.
  • Assign the value returned from the parameterized method “combine()”.
  • Return the object properties.
• Define the parameterized method “combine()” with the return type of “IntTreeNode”,
  • Check whether the root of the first binary tree is null,
    • If it is true, check whether the root of the second binary tree is null,
      • If it is true, return null value.
    • Otherwise, return a reference.
      • • Otherwise, check whether the root of the second tree is null,
        • • If it is true, return a reference.
        • Otherwise, return another reference.