Building Java Programs: A Back to Basics Approach (4th Edition)
Building Java Programs: A Back to Basics Approach (4th Edition)
4th Edition
ISBN: 9780134322766
Author: Stuart Reges, Marty Stepp
Publisher: PEARSON
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Chapter 17, Problem 2E
Program Plan Intro

A method “countEmpty()”

Program plan:

  • Define the method “countEmpty()”,
    • Return the value returned from the parameterized method “countEmpty()”.
  • Define the parameterized method “countEmpty()”,
    • Check whether the root of the tree is null,
      • If it is true, return “1”.
        • Otherwise, return the calculated value.

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