CS 1401 Assignment #4

Date Assigned: Monday, February 11, or Tuesday, February 12, 2008.

Due Date: Monday, February 18, or Tuesday, February 19, 2008, before the beginning of your lab section.

Objective: The main objective of this assignment is to practice using conditional statements.

Programming assignment: Use JOptionPane to design a simple English language sentence generator with a random component, so that the user never knows quite what to expect for the output sentence, unless one “special” name is entered. This sentence generator should read expressions composed of a person’s name followed by a positive integer between 1 and 9999 enclosed in parentheses, such Cupid(1442).  For output, it should produce a complete sentence about the person, such as “Cupid is a great Java programmer!” The procedure for completing the sentence is as follows: 

·         The program should pass the input integer as a “seed” to a pseudo-random number generator object (see below).

·         The random number generator will use the seed to produce a single-digit integer between 0 and 9 as output.

·         Write your program so that the sentence completion is based upon the output random integer, or a match with the “special” name.

·         To reduce the number of sentences that you have to code, you may use one sentence completion for multiple random integers or “special” name match, as shown in the examples below:

 

Random number is 0, 1, or 2:  “ is new to Java, and so his code is sometimes off target.”

Random number is 3, 4, or 5:  “ is right on the mark with his Java conditional statements.”

Random number is 6, 7, or 8:  “ really knows how to pair up a great algorithm with great code!”

Input name matches defined “special” name, or random number is 9:   “, you’re the best!”

 

Hints: You already know most of the tricks that you need to build such a sentence generator:

To Add: For this lab add the following new concepts:

import java.util.Random;      

·         Add these statements to your code to create a new pseudo-random number generator object, using class Random:

      Random rand = new Random(number);    //number should be assigned the input integer value

      randNum = rand.nextInt(9);                      //.nextInt(9) will return an integer from 0-9   

              
 

Homework assignment: on a separate sheet of paper, solve Ex. 10 from p. 218 and Ex. 12 from p. 219.

Deliverables: as instructed by your TA.

Extra Credit:  In addition to this assignment, write the program using a switch statement rather than if-else statements for the sentence completions, and add a check for valid input integers between 1 and 9999.  Display an error message if the input number is out of range.