Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
COSC 117 Lab 6 – Spring 2017 Programs for this lab should be stored in your Eclipse repository. Create a new Java project in your workspace called lab6. Remember to use a location on your P: drive or a USB drive (not the C: drive). When your programs are running correctly, turn in a printout of the Java code. But wait… there’s more.! Starting with this lab you also need to send an email containing your .java files for each program (as separate file attachments) to the instructor at [email protected] with the subject line “COSC 117 Lab 6”. The .java files should be located in the src directory for your Eclipse project. Since this lab consists of three programs, Ithere should be three attachments. Problem 1 Write a program called BetterSurvey that tallies the results for a beverage survey like the Survey program in the previous lab. For this version, the program should not assume that the user always enters a valid choice. Instead, display an error message when the user enters an incorrect number and prompt them to enter a choice again. This version should also display a counter with each person so that the survey taker knows how many people have been surveyed. Your output should look similar to the example below. Example 1: 1.Coffee 2.Milk 3.Red Bull Please enter person #1's choice: 1.Coffee 2.Milk 3.Red Bull Please enter person #2's choice: 7 is not a valid choice. Please 1.Coffee 2.Milk 3.Red Bull Please enter person #2's choice: 1.Coffee 2.Milk 3.Red Bull Please enter person #3's choice: 4.Water 2 4.Water 7 try again. 4.Water 2 4.Water -1 Survey Results ============== Coffee 0 Milk 2 Red Bull 0 Water 0 Problem 2 Write a new program named RomanNumeralsII that prompts the user to enter an integer between 1 and 10 (inclusive). The program should then display the Roman numeral equivalent for that number (see http://en.wikipedia.org/wiki/Roman_numerals). The difference between this program and the RomanNumeral program in lab 4 is that this program will validate that the entered number and force the user to enter a number in the specified range. It should keep prompting the user to enter integers until they enter one in the correct range. Since the user has to Page 1 of 2 COSC 117 Lab 6 – Spring 2017 enter a number in the correct range to continue, the if-else in the main program no longer needs to handle numbers that are not in the correct range. Example 1: Enter an integer from 1 to 10 (inclusive): 4 The Roman numeral for 4 is IV. Example 2: Enter an integer from 1 to 10 (inclusive): -3 -3 is not a valid choice. Enter an integer from 1 to 10 (inclusive): 2 The Roman numeral for 2 is II. Example 3: Enter an integer from 1 to 347 is not a valid choice. Enter an integer from 1 to -9 is not a valid choice. Enter an integer from 1 to 0 is not a valid choice. Enter an integer from 1 to The Roman numeral for 9 is 10 (inclusive): 347 10 (inclusive): -9 10 (inclusive): 0 10 (inclusive): 9 IX. Problem 3 In an earlier lab you were asked to write a program that calculated the factorial of an integer (see http://en.wikipedia.org/wiki/Factorial). For this problem you are going to expand on the earlier Factorial program. Write a program called FactMore that repeatedly prompts the user for an integer number (n) and displays the factorial of that number (n!). Your program should contain two methods: a main method which uses a while loop to do all necessary input and output, and a separate method called factorial that accepts one integer parameter and returns the factorial of that integer. The factorial method should not perform any input from or output to the console. Example 1: Enter a non-negative integer (-1 to quit): 4 4! = 24 Enter a non-negative integer (-1 to quit): 4 0! = 1 Enter a non-negative integer (-1 to quit): -1 Goodbye! Page 2 of 2