Computer Science 202
Introduction to Programming

Fall 2012, The College of Saint Rose

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For this programming project, you will demonstrate your skills writing conditionals and loops by developing a Visual Logic flowchart then a Java program that keeps track of some temperature information.

Ground Rules

You must work individually on this program. While you may ask for help from your instructor or from the tutors in the Academic Support Center, that help will be more limited than for regular lab assignments. Additionally, any help you receive must be clearly documented in the comment at the top of your program (i.e., who helped you and exactly what that help was).

Program Requirements

You will be developing both a Visual Logic flowchart and a Java program. Your flowchart must be saved as HotAndCold.vls and your Java program must be in a file named HotAndCold.java. When you are ready to develop your Java program, follow the usual procedures to create a BlueJ project that includes a class with this name.

Read these requirements carefully and follow them precisely. Part of your grade will depend on you formatting prompts and printouts as described.

• Your program should begin by printing instructions:

  You can enter temperatures (F) for as many days as you wish.
  To stop, enter a temperature less than -100 or greater than 150.
  

• It should then repeatedly ask for the temperature for a day, where the prompt includes the day number:

  Please enter the temperature for day 1:
  

  (of course, on the second day it should say "day 2", etc..)

• It should stop asking for temperatures if the temperature entered is below -100 or above 150.
• As each temperature is entered, your program should keep track of the information needed to produce output that includes the number of cold days (as defined by temperatures less than 32) and the number of warm days (32 degrees and up), as well as the average temperature among the cold days and the average temperature among the warm days.
• Once an out-of-range temperature is entered, your program should print the results. For example, if the temperatures entered were 9, 52, -5, 0, and 40, it should produce the output:

  There were 3 cold days, averaging 1.3 degrees.
  There were 2 warm days, averaging 46.0 degrees.
  

• If the input does not include any cold days, the "cold days" output should be replaced by:

  There were no cold days!
  

  Similarly if there are no warm days given.

• You do not need to worry about invalid input here. A temperature out of range will simply cause the results to be printed and the program to stop. If someone types in a value that is not a number, too bad for them.

Visual Logic-specific Requirements

• You may use either dialog boxes or console input/output in your flowchart, but be consistent throughout the flowchart.

Java-specific Requirements

• You may use either Scanner/System.out.println or JOptionPane methods for input/output in your program, but be consistent throughout the flowchart.
• You should define and use named constants for important numbers in your program.
• Assume that all temperatures are floating-point values.
• Print all floating point values with exactly one digit after the decimal point.

Style and Documentation Reminders

Before you submit your Java program, make sure it conforms to our guidelines for style and documentation.

In particular, you should have a comment at the top of your class that describes your program and has your name, the course number and section (02 for 11:15, E1 for 4:10). You should have comments throughout your programs describing your variables and any non-obvious Java statements or groups of statements.

All identifiers (class names and variable names) should be meaningful and conform to Java's naming conventions.

Your code should be nicely formatted, with new lines after any { or }, and indented as done in class examples.

Bonus Opportunity

For a few bonus points, you may extend your Java program to keep track of the coldest and warmest days, reporting the appropriate extreme temperatures along with the day or days on which it occurred.

Submitting Your Work

Before 11:59 AM, Wednesday, October 31, 2012, submit your Visual Logic flowchart and Java program to Blackboard for grading. Please upload your Visual Logic file (HotAndCold.vls) and your Java source file (HotAndCold.java - upload the one with the .java file extension, not the .class, .ctxt, package.bluej or README files).

Grading

This assignment is worth 50 points, which are distributed as follows: