handout #4
CSE142—Computer Programming I
Programming Assignment #1
due: Thursday, 1/12/06, 2 pm
Your first program will require the use of
static methods and println statements. This
assignment is worth 10 points instead of the normal 20 points. You are going to write a Java program that
produces as output the following song.
There was an old woman who swallowed a fly.
I don't know why she swallowed that fly,
Perhaps she'll die.
There was an old woman who swallowed a spider,
That wriggled and iggled and jiggled inside her.
She swallowed the spider to catch the fly,
I don't know why she swallowed that fly,
Perhaps she'll die.
There was an old woman who swallowed a bird,
How absurd to swallow a bird.
She swallowed the bird to catch the spider,
She swallowed the spider to catch the fly,
I don't know why she swallowed that fly,
Perhaps she'll die.
There was an old woman who swallowed a cat,
Imagine that to swallow a cat.
She swallowed the cat to catch the bird,
She swallowed the bird to catch the spider,
She swallowed the spider to catch the fly,
I don't know why she swallowed that fly,
Perhaps she'll die.
There was an old woman who swallowed a dog,
What a hog to swallow a dog.
She swallowed the dog to catch the cat,
She swallowed the cat to catch the bird,
She swallowed the bird to catch the spider,
She swallowed the spider to catch the fly,
I don't know why she swallowed that fly,
Perhaps she'll die.
There was an old woman who swallowed a horse,
She died of course.
You must exactly reproduce the format of this
output.
You are to make use of
static methods to avoid the “simple” redundancy. In particular, you are to make sure that you use only one println
statement for each distinct line of the song.
For example, this line:
Perhaps she'll die.
appears several times in the output. You are to have only one println statement
in your program for producing this line.
The more complex redundancy has to do with pairs of lines like these:
There was an old woman who swallowed a horse,
There was an old woman who swallowed a dog,
and like these:
She swallowed the dog to eat the cat,
She swallowed the cat to eat the bird,
It is not possible to avoid this redundancy
using just methods and simple println statements, so you are not expected to do
so. There is, however, a structural
redundancy that you can eliminate with static methods and this will be worth a
point. The key question to ask yourself
is whether or not you have repeated lines of code that could be eliminated if
you structured your static methods differently.
You should also be using static methods to
capture the structure of the song. You
should, for example, have a different method for each verse of the song.
You are not allowed to use more advanced
features than what we have covered in class.
For this assignment, you should limit yourself to the Java features
covered in chapter 1 of the text.
You should include a comment at the beginning of
your program with some basic information and a description of the program, as
in:
// Carl Ebeling
// 1/12/06
// CSE142
// TA: George Bush
// Assignment #1
//
// This program will...
You should name your file Song.java and you
should turn it in electronically from the “assignments” link on the class web
page.