CSE 131 Module 3: Arrays

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Exercises

These exercises are part of the asynchronous component of this course. Material is taught and demonstrated, but at times you are asked to complete one of the exercises to help you master the new concepts.

In the repository you are using for this course, look inside the exercises source folder, and you will see assignments organized by name. Before continuing on to the next portion of the asynchronous material, spend some time on the exercise. When you are finished, commit your code so that credit for the exercise can be given.

It is not so important that you get the exercise exactly right. It is important to work through it as best you can before you look at the solution or continue with other work in this module.

Before starting this exercise:
Be sure to update your repository before beginning this assignment, so that you receive any code you need.

Making a copy of an array, and Pig Latin

• First you will make a copy of an array.
• Then you will change your code so that as you copy, you create the Pig Latin version of each string from the original array.

Instructions

• Find and open the CopyArraysAndPigLatin Java program in the exercises3 package of the exercises source folder.
• Write code to make a copy of the provided names array. We do this so that we can make changes to the copy without affecting the original array. If we call the copy array copy, then the steps you take are as follows:
  • Allocate the copy array with enough space to hold each of the elements of name.

    Do not use constants here: pretend that the names array could be of any length.

  • Iterate over the names array to assign each element of copy from names.
• Check your results by iterating over copy and printing each element.
• Now go back and cause each element of the copy array to have the Pig Latin version of each string in the original names array.

After completing this exercise:
Commit any files you have changed so that you receive credit for your work!

Before starting this exercise:
Be sure to update your repository before beginning this assignment, so that you receive any code you need.

Making a shuffled copy of an array

Instructions

• Find and open the Shuffle Java program in the exercises3 package of the exercises source folder.
• It declares an array of strings called original that contains the strings A through H, in alphabetical order.
• The goal of this exercise is to shuffle this array, or a copy of it as you prefer, so at to obtain a randomized order of the strings.
• This is tricky, so try your best but don't feel bad if you need to see the solution before you have it working completely.

  You can watch just enough of the solution video to get unstuck and then try moving forward on your own.

After completing this exercise:
Commit any files you have changed so that you receive credit for your work!

Before starting this exercise:
Be sure to update your repository before beginning this assignment, so that you receive any code you need.

Creating a multiplication table

• Long before computers existed as electronic machines, the word computor was a name for a human whose job consisted of computing and tabulating mathematical results.
• In this exercise, you produce a table of products.

Instructions

• Find and open the TimesTable Java program in the exercises3 package of the exercises source folder.
• Complete the class so it prints a table of products, as shown on the introductory video.

  Your columns should line up nicely, assuming that all products take at most 2 digits. In other words, it should look nice when given an input value of 9. For greater values, your columns need not line up but the data should be correct.

After completing this exercise:
Commit any files you have changed so that you receive credit for your work!