1. circleArea.py
2. oldmac.py
3. shapes.py
4. swap.py
5. winpercent.py

# This program finds the area of a circle, given user input
# for the radius of the circle.
# Refactored (again) to use a module
# by CSCI111

from shapes import calculateAreaOfCircle

def main():
    print("This program calculates the area of a circle.")
    print()
    
    user_radius=float(input("Enter circle's radius: "))
    
    area=calculateAreaOfCircle(user_radius)
    
    print()
    print("The area of the circle is", round(area,3))


main()

# Print out verses of the song Old MacDonald
# Sara Sprenkle

BEGIN_END = "Old McDonald had a farm"
EIEIO = ", E-I-E-I-O"

def main():
    # call the printVerse function to print out a verse
    printVerse("dog", "ruff")
    printVerse("duck", "quack")
    
    animal_type = "cow"
    animal_sound = "moo"
    
    printVerse(animal_type, animal_sound)
    

# QUESTION: What happens if main called function as
# printVerse("ruff", "dog")

def printVerse(animal, sound):
    """
    Prints a verse of Old MacDonald, plugging in the animal and sound
    parameters (which are strings), as appropriate.
    """
    print(BEGIN_END, EIEIO)
    print("And on that farm he had a", animal, EIEIO)
    print("With a", sound, ", ", sound, "here")
    print("And a ", sound, ", ", sound, "there")
    print("Here a", sound)
    print("There a", sound)
    print("Everywhere a", sound, ", ", sound)
    print(BEGIN_END, EIEIO)
    print()

if __name__ == '__main__':
	main()

# Helpful functions relating to shapes!
# TODO: Create functions for finding the area of a rectangle, triangle, ...
# By CSCI 111

import test
import math


def calculateAreaOfCircle(radius):
    """
    returns the area of the circle
    radius: the circle's radius as a non-negative float
    """
    area=math.pi*radius**2
    return area
	
	
	
def testCalculateAreaOfCircle():
    test.testEqual(calculateAreaOfCircle(1), 3.14159, 4)
    test.testEqual(calculateAreaOfCircle(2), 12.56637, 4)
    test.testEqual(calculateAreaOfCircle(.5), .7853975, 4)


if __name__ == '__main__':
    testCalculateAreaOfCircle()

# Swap the values of two variables
# Shows that immutable data types are passed as *copies*
# By CSCI111

def main():
    x = 5
    y = 7
    print("Before: x =", x, "y =", y)
    
    tmp = x
    x = y
    y = tmp
    
    print("After:  x =", x, "y =", y)
    
    print("\n~~~~~~~~~~~ Using swap function ~~~~~~~~~~~~")
    
    swap(x, y)
    print("After swap function: x =", x, "y =", y)
    print("\nParameters x and y were copied.")
    print("the actual parameters do not change.")


def swap(x, y):
    tmp = x
    x = y
    y = tmp


main()

# Calculates a team's winning percentage
# Demonstrates bottom-up development practice
# By CSCI111

import test

def main():
    print("This program will calculate your team's win percentage.")
    print()
    
    numWins = eval(input("Enter the number of wins: "))
    numLosses = eval(input("Enter the number of losses: "))
    
    pctWins = calculateWinPercentage(numWins, numLosses)
    
    print("Your win percentage is", pctWins*100)
    # multiplying by 100 to get something more user-friendly.


def calculateWinPercentage(wins, losses):
    """
    Calculates and returns a win percentage, based on the given wins 
    and losses.
    Parameters:
    - wins: a non-negative integer representing the number of wins
    - losses: a non-negative integer representing the number of losses
    Pre: either wins or losses must be greater than 1 or will throw a divide
    by zero error
    Post: returns the win percentage (between 0 and 1, inclusive) 
    """
    winPct = wins / (wins + losses)
    return winPct
	
def testWinPercentage():
    test.testEqual(calculateWinPercentage(0, 1), 0)
    test.testEqual(calculateWinPercentage(2, 2), .5)
    test.testEqual(calculateWinPercentage(3, 7), .3)
    test.testEqual(calculateWinPercentage(1, 0), 1)

# testWinPercentage()
main()