CS313E Assignment 0--Some Simple Python (10 points)

Due: by midnight Monday, September 10, 2012.

Your program listing should have the following information.

#  File: Assignment0.py
#
# Description:
#
# Student's Name:
#
# Student's UT EID:
#
# Course Name: CS 313E 
#
# Date Created:
#
# Date Last Modified:

• You must submit the .py file.
• Your .py file should have the header with the proper documentation.
• You should be submitting your .py file through the web based turnin program. We will not accept files e-mailed to us.
• Your code must compile in Python 3 before submission.

The Assignment

Write a program to prompt the user to type in a line of text at the terminal. You will do this repeatedly until the user types an empty line. For each line the user types, do each of the following:

1. display the line on the screen;
2. display it again in all uppercase;
3. display it again in all lowercase;
4. count each letter a-z (in the lowercase version) and display the counts (ignore any non-letters);
5. display the line again using a Caesar Cipher to shift each letter (ignore non-letters) in the lowercase version by one character to the right (that is A goes to B, B goes to C, ..., Z goes to A).

It took me about 15 minutes to write this program. You may need the Python functions ord and chr.

Sample Output

felix:~/cs313e/assignments> python hw0.py

Please enter a string: Take a zebra for a walk?
User's input:  Take a zebra for a walk?
In uppercase:  TAKE A ZEBRA FOR A WALK?
In lowercase:  take a zebra for a walk?
The input contains the following characters:
   a: 5
   b: 1
   c: 0
   d: 0
   e: 2
   f: 1
   g: 0
   h: 0
   i: 0
   j: 0
   k: 2
   l: 1
   m: 0
   n: 0
   o: 1
   p: 0
   q: 0
   r: 2
   s: 0
   t: 1
   u: 0
   v: 0
   w: 1
   x: 0
   y: 0
   z: 1
Using the Caesar cipher: ublfbafcsbgpsbxbml

Please enter a string: 
felix:~/cs313e/assignments>