CSC111 Lab 6 2014

--D. Thiebaut (talk) 15:00, 3 March 2014 (EST)

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Old MacDonald's Farm

Old MacDonald's farm is a song (almost) all American kids learn at one point in their life. I certainly never heard it when I grew up in France, but I think most of you will be familiar with it. If you don't know it, this YouTube video will get you acquainted with it. :-)

The goal of this problem is for you to add a section to the program below so that it prints parts of the lyrics of the famous song using a for-loop and functions.

Here's the beginning program which you have to modify:

# start with four animals in the farm
farm = [ "horse", "pig", "dog", "cat" ]

# sing(): a function that simulates singing a refrain for the song
# using the animal name.     
def sing( word ):
     print( word )

# "sing" all the names of the animals
for animal in farm:
     sing( animal )

• Create the program in lab6.py and run it.

Challenge 1

• Modify the function so that the output looks like the lyrics of the song:

    And on his farm he had a horse, E-I-E-I-O
    
    And on his farm he had a pig, E-I-E-I-O
    
    And on his farm he had a dog, E-I-E-I-O
    
    And on his farm he had a cat, E-I-E-I-O

• Make sure there's a blank line between each line with an animal name.

Challenge 2

• Modify the function some more so that the output looks like the lyrics of the song:

    Old MacDonald had a farm, E-I-E-I-O
    And on his farm he had a horse, E-I-E-I-O
    Here a horse, there a horse, everywhere a horse!
    
    Old MacDonald had a farm, E-I-E-I-O
    And on his farm he had a pig, E-I-E-I-O
    Here a pig, there a pig, everywhere a pig!
    
    Old MacDonald had a farm, E-I-E-I-O
    And on his farm he had a dog, E-I-E-I-O
    Here a dog, there a dog, everywhere a dog!
    
    Old MacDonald had a farm, E-I-E-I-O
    And on his farm he had a cat, E-I-E-I-O
    Here a cat, there a cat, everywhere a cat!

Challenge 3

• Modify your program a third time, and introduce a new function that will receive 4 animals as parameters, and will call the function sing( ) for each one.

Here is an outline of what your final program should look like (you have to figure out what to replace the ellipses with!)

def sing( word ):
     print( ... )
     print( ...  word ... )
     print( ... )

def singSong( animal1, animal2, animal3, animal4 ):
     sing( animal1 )
     sing( animal2 )
     sing( animal3 )
     sing( animal4 )


singSong( "horse" ... )