Assignment #3

Due: Tues, June 10

Objective

This assignment will involve practice with loops.

Task

Write the following programs, each in a separate file. Filenames should be:

Numbers.java
GuessingGame.java

(Make sure to use these exact filenames).

Exercise 1

Filename: Numbers.java

Write a program that will allow the user to enter a set of integers (as many as they want), then prints out a summary of information, as follows:

Prompt the user continually to enter a number, until the value 0 is entered, which will be the signal to stop entering values. (This is sometimes known as a "sentinel" value).
Once the sentinel value has been entered, print out the following information:
- The number of positive values that were input
- The number of negative values that were input
- The sum of the input values
- The average (to two decimal places) of the input values
Your output must match mine exactly. See the sample runs below

Sample Runs

(user input is underlined, to distinguish it from output)

Sample Run 1

  Input integer (0 to stop): 12
  Input integer (0 to stop): 4
  Input integer (0 to stop): -1
  Input integer (0 to stop): -5
  Input integer (0 to stop): 18
  Input integer (0 to stop): 0

  # of positives = 3
  # of negatives = 2
  Sum = 28
  Average = 5.60

Sample Run 2

  Input integer (0 to stop): 4
  Input integer (0 to stop): 8
  Input integer (0 to stop): 24
  Input integer (0 to stop): 94
  Input integer (0 to stop): -1
  Input integer (0 to stop): 43
  Input integer (0 to stop): 13
  Input integer (0 to stop): 0

  # of positives = 6
  # of negatives = 1
  Sum = 185
  Average = 26.43

Exercise 2

Filename: GuessingGame.java

Write a program that plays a Hi-Lo guessing game with the user. It should work as follows:

Pick a random integer in the range of 1 through 100.
Repeadedly prompt the user to enter a guess, and allow the user to type in their guess
For each guess the user enters, report to the user the appropriate information -- that they are corerct, or that their guess is too high or too low
When the user guesses the correct value, include the number of guesses it took in the output message
Your output messages should match the ones in the sample runs below

Sample Runs

(user input is underlined, to distinguish it from output)

Sample Run 1

Enter a guess (1-100): 50
  You guessed too low

Enter a guess (1-100): 70
  You guessed too low

Enter a guess (1-100): 80
  You guessed too low

Enter a guess (1-100): 90
  You guessed too low

Enter a guess (1-100): 97
  You guessed too high

Enter a guess (1-100): 94
  You guessed too low

Enter a guess (1-100): 95
  You guessed too low

Enter a guess (1-100): 96
  Correct!  You guessed the number in 8 guesses.

Sample Run 2

Enter a guess (1-100): 50
  You guessed too low

Enter a guess (1-100): 80
  You guessed too high

Enter a guess (1-100): 60
  You guessed too high

Enter a guess (1-100): 55
  You guessed too high

Enter a guess (1-100): 53
  You guessed too low

Enter a guess (1-100): 54
  Correct!  You guessed the number in 6 guesses.

Requirements for both programs

Use the Scanner class for input
When you write source code, make sure it is clear, readable, and well-documented. (See style guidelines posted on home page)

Submitting:

Submit the files through the Assignment 3 Blackboard link. Make sure you attach BOTH files before you click Submit:

  Numbers.java
  GuessingGame.java