• Due
• What You Need to Do
• Setup On Your Machine
• Specification
• Output
• Suggestions
• Testing on Your Machine
• Copy the Script to Unix
• Testing the Script on Unix (Optional)

Due

Sunday, September 21st at 11:59 PM

What You Need to Do

• Create the script hw3.py
• Make sure it obeys the rules in Rules for Homework Scripts
• Move it to an an hw3 directory on pe15.cs.umb.edu

Setup On Your Machine

• Open a text editor.
  I would suggest the text editor built into the program IDLE.
• Save the file as hw3.py

Specification

• This program must prompt the user for a temperature in Fahrenheit
• It should then convert that value to Kelvin
• And print with label "Kelvin" along with the Kelvin temperature
• The size of a degree in Kelvin is the same as a degree in Celsius
• But 0 degrees Kelvin is absolute 0, -273.15 degrees Celsius
• Absolute zero is when all molecular movement stops
• The Kelvin temperature must be an integer
• Then the program must print a blank line
• The program must now prompt the user for a temperature in Kelvin
• It should then convert that number to Fahrenheit
• And print the label "Fahrenheit" along with the Fahrenheit temperature along
• This Fahrenheit temperature must be an integer
• You convert Fahrenheit to Kelvin like this

  Kelvin = (Fahrenheit - 32) / 1.8 + 273.15

• To go from Kelvin to Fahrenheit

  Fahrenheit = Kelvin * 9/5 - 459.67

Output

• The output should look something like this

  Fahrenheit: 30
  Kelvin 272
  
  Kelvin: 272
  Fahrenheit 30

• The text in blue is what the user enters

Suggestions

• Write this script in stages
• Test your script at each step
• Print the steps below
• And check them off as you finish each one

1. Write an assignment statement which asks the user for a temperature in Fahrenheit and stores it in the variable fahr.
   Convert the value of fahr using int().
   Write a print statement to print the value of fahr.
   Save the file and quit.
   Run the script to make sure it works properly.
   If it does not work, fix the problem.
2. Write an assignment statement that calculates the value the of the temperature in Kelvin and assigns it to the variable kelvin.
   Use the formula above and the value of the variable fahr.
   Write a print statement to print "Kelvin" and the rounded Kelvin value.
   Save the file and quit.
   Run the script to make sure it works properly.
   A Fahrenheit value of 30 should give a Kelvin value of 272.
   A Kelvin value of 272 should give a Fahrenheit value of 30.
   If it does not work, fix the problem.
3. Repeat the above steps for the Kelvin to Fahrenheit conversion.

Testing on Your Machine

• Open IDLE
• Use the Open command in IDLE to open hw3.py
• Run your script inside IDLE
• Your output should look something like this

  			Fahrenheit: 30
  Kelvin 272
  
  Kelvin: 272
  Fahrenheit 30

• The text in blue is what the user enters

Copy the Script to Unix

• Open FileZilla and connect to pe15.cs.umb.edu
• Go to your it116 directory
• Go to your hw directory
• Right-click in the whitespace inside the hw directory
• Enter hw3 in the dialog box
• Click and drag your script from the bottom left panel to the bottom right panel

Testing the Script on Unix (Optional)

• Connect to pe15.cs.umb.edu using an ssh client like putty.exe (Windows) or ssh (Mac)
• Go to the directory for this exercise

  cd  it116/hw/hw3

• Run this script

  python3 hw3.py

• You should see something like this

  Fahrenheit: 30
  Kelvin 272
  
  Kelvin: 272
  Fahrenheit 30

• The text in blue is what the user enters

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