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Byron's CSC212 Web Site
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Class Notes
Wednesday November 29 , 2000
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Word Dictionary Random Generator
Class Notes --
Wednesday November 29 , 2000
CSC212 - November 29, 2000
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Lecture Topic: DICTIONARY CLASS
A Dictionary
__________________________
| tree | (tree) |
| monkey | (mon key) |
| bear | (bear) |
| prepare | (pre pare) |
|__________|_______________|
d.select () // would select any one of the
// words at random.
d.select (n) // would select words with
// n syllables.
d.select ("tree","key") // would return a random word
// ending in one of these
// strings (syllables).
d.select (1,"tree","key")// would return a random word
// of one syllable ending in
// either "tree" or "key".
On Generating random numbers:
In the "blue.math.*"
package is a class called "RandomGenerator" which
can be used to generate random numbers.
Specifications
new RandomNumber() -> <RandomGenerator>
<RandomGenerator>.uniform(<int>,<int>) -> <int>
This method generates a random integer between the
first <int> and the second <int> inclusive.
Ex:
RandomGenerator rg = new RandomGenerator()
for (int x=1; x< 10; x++)
{
int rn = rg.uniform(0,100);
IO.println(rn)
}
Practice: Implement <Dictionary>.select() -> <Word>
in the Dictionary Class
Instance Variables
private String name;
private Word[] words;
private int nrElements;
Select Routine
public Word select()
{
RandonGenerator rg = new RandomGenerator();
int rn = rg.uniform(0,nrElements-1);
return words[rn];
}
Second Part of Program 5 Assignment:
Part 2 of Final Programming Challenge
1. Create several (like 3,4, or 5) small dictionaries
each containing a "part of speach".
(Article, noun, verb, adjective)
Do this by creating a data file for each dictionary.
And then "Reading" the Dictionary using the
appropriate functionality.
(Look at the begining of lab)
Write a number of methods, each of which will
generate a "fixed" sort of phrase - at random.
It will be "fixed" in that each time you call it, it
will generate a similar sentence in terms of parts
of speach, rythm, & rhyme.
Ex: SimplePhraseOfType1()
// Might print a sentence consisting of -
Article The
Noun Cat
Verb ate
Article the
Adjective fat
Noun mouse
with particular "rythm & rhyme"
2. Suppose: Article, noun, verb, adjective
are Dictionarys
(static global Dictionary variables)
static private void simplePhraseOfType1()
{
// Article Dictionary
Word article1 = article.select();
Word noun1 = noun.select(2);
Word verb = verb.select();
Word article2 = article.select();
Word adjective= adjective.select();
Word noun2 = noun.select(2);
// Write PrintSentence
printSentence (article1,noun1,verb,article2, +
adjective,noun2);
}
3. Use the few methods in some interesting ways.
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