CS 115 Lab 10

CS 115 Lab 10 Pig Latin

90 Points

Due Date: Monday, April 12, end of lab session

Use the Canvas link to submit your work.

Educational goals of this lab - verify that every student can

use string indexes
use string methods

INSTRUCTIONS:

(90 points) Problem : Pig Latin Translator

Wikipedia reference Look at this page for more word examples
"Pig Latin" is a made-up language some people use when they are trying to hide what they are saying from someone. It's used by parents in front of young children, for example. A gang might use it in front of outsiders. It's not really Latin, just a set of rules for modifying English words.
VERSION 1
- The rules of Pig Latin that we will use to begin with:
  - for words that start with vowels ('a','e','i','o','u'), just add "way" to the end of the word.
  - for words that start with consonants (essentially anything not vowels), the first letter of the word is put at the right end of the word, then the string "ay" is added to the word's right end.
- NOTE: You do not just want to print the words as you convert them, you want to create a new string which has all the pig Latin words in it. If you need to print for debugging purposes, fine, but create a new string! (Hint: string as accumulator!)
```
Enter a sentence: A sentence to be translated by a knight
Away entencesay otay ebay ranslatedtay ybay away nightkay
```
- Get THIS version running before you go to the next version.

(20 points) Design

Use this design for Version 1. For Version 2, write the design for the find_vowel function and for the main, as usual.

Design for Version 1

input sentence
split sentence into list of words
initialize new sentence
make a string of all the vowels

loop each word of the words in sentence
    if word[0] in vowels
       add to new sentence with suffix
    else
       add to new sentence with suffix

print new sentence

(60 points) VERSION 2
- Strictly, a more accurate version of the Pig Latin rule says that if the word does not start with a vowel, then take off all the letters up to the first vowel and put that group on the right end of the word and follow with "ay". So words like "schedule", "striped" and "thrust" need more than the first letter moved. They should come out as "eduleschay", "ipedstray", and "ustthray".
- Write a function called find_vowel with one parameter, the word (a string). It returns the location of the vowel (vowels are aeiou) that is closest to the left end of the word, and -1 if no vowel is found at all.
- It should handle either upper or lower case strings. Use of the .lower() method is encouraged.
- This function uses a WHILE loop with two ending conditions. No BREAK! Use a flag!
- Recall that every function has no more than ONE return and it is at the BOTTOM of the function. Otherwise you are breaking the structured programming rules.
- Of course this function gets the 3 P's and some other documentation. Document your control structure.
- Using that function, you can modify the main function logic. You slice off all of the word that is consonants, up to the first vowel, stick that piece on the right end and then follow with "ay".
- What if you get a weird string that has NO vowels?? "xyzzy"? "hymn"? then just stick "ay" on the end of it, you don't have to move any characters around.
- AND just like version 1, for words that start with vowels, just add "way" to the end of the word.
- Sample run:
```
Enter a sentence: The magic word is XYZZY strength
eThay agicmay ordway isway XYZZYay engthstray
```

(10 points) Test cases

Put at bottom of file as usual.

Test cases for find_vowel

Single words
Description	Input (Parameter)	Expected Output (return)
vowel in first position	angle	returns 0
vowel in second position	castle	returns ____A.___
vowel in third position	train	returns ___B.___
no vowel at all	hymn	returns _____C._____

Test cases for whole program

Single and multiple words
Description	Input	Expected Output
one-word sentence	Victory	____D.____
two-word sentence	get out	____E.____
sentence with lots of whitespace	the cat in the hat	____F.____
empty string	""	____G.____
word with no vowels	xyzzy	____H.____
word with vowel in position 0	apple	____I.____
word with vowel in position 4	syllable	____J.____