1. average2.py
2. average2_withmain.py
3. circleShiftAnim2.py
4. circleShiftAnim3.py
5. circleShiftAnim.py
6. mystery.py
7. oldmac.py
8. test.py
9. testSumEvens.py

# Program to find the average of two numbers
# by Sara Sprenkle

def average2(num1, num2):
    """
    Parameters: two numbers to be averaged
    Returns the average of two numbers
    """
    average = (num1 + num2)/2
    return average
    
print("This program will find the average of two numbers.")
print()

num1 = eval(input("Enter the first number: " ))
num2 = eval(input("Enter the second number: "))

# calculate the average of the two numbers
average = average2(num1, num2)

print("The average of", num1, "and", num2, "is", average)

# Program to find the average of two numbers.
# Demonstrates using a main function.
# by Sara Sprenkle

def main():
    print("This program will find the average of two numbers.")
    print()
    
    num1 = eval(input("Enter the first number: " ))
    num2 = eval(input("Enter the second number: "))
    
    # calculate the average of the two numbers
    average = average2(num1, num2)
    
    print("The average of", num1, "and", num2, "is", average)

def average2(num1, num2):
    """
    Parameters: two numbers to be averaged
    Returns the average of two numbers
    """
    average = (num1 + num2)/2
    return average
    
main()

# Animate moving a circle to the position clicked by the user 5 times.
# Another version of the program, with a different refactoring
# by CSCI 111

from graphics import *
from time import sleep

STEPS = 100
NUM_TIMES = 5

def main():
    win = GraphWin("My Circle", 500, 500)
    
    centerPoint = Point(25, 25)
    circle = Circle(centerPoint, 25)
    circle.draw(win)
    
    anchorPoint = Point(win.getWidth()/2, 10)
    # tell the user that they need to click somewhere -- 
    instruction = Text( anchorPoint, "Click where you want the circle to go")
    instruction.draw(win)
    
    for time in range(NUM_TIMES):
        # the user picks the new center    
        destPoint = win.getMouse()
        # animate the circle to that new location
        animateCircle( circle, destPoint )
    
    win.getMouse()
    win.close()

def animateCircle( circle, newCenter ):
    """
    Animates moving the circle from its current position to the
    new location.
    circle: the Circle object to be moved
    newCenter: the Point object where the circle should end up.
    """
    # what is the total distance we need to go, 
    # in both the x and y direction?
    centerPoint = circle.getCenter()

    changeInX = newCenter.getX() - centerPoint.getX()
    changeInY = newCenter.getY() - centerPoint.getY()
    # animate to that new position.
    for step in range(STEPS):
        circle.move(changeInX/STEPS, changeInY/STEPS)
        sleep(.01)

main()

# Animate moving a circle to the position clicked by the user 5 times.
# Another version of the program, with a different refactoring
# by CSCI 111

from graphics import *
from time import sleep

STEPS = 100

def main():
    win = GraphWin("My Circle", 500, 500)
    
    centerPoint = Point(25, 25)
    circle = Circle(centerPoint, 25)
    circle.draw(win)
    
    anchorPoint = Point(win.getWidth()/2, 10)
    # tell the user that they need to click somewhere -- 
    instruction = Text( anchorPoint, "Click where you want the circle to go")
    instruction.draw(win)
    
    repeatAnimatingCircleToUserClick(circle, win, 5)
    
    win.getMouse()
    win.close()
    

def repeatAnimatingCircleToUserClick(circle, window, numRepeats):
    """
    Animates moving the circle to where the user clicked a number of times.
    circle - the Circle object to be moved
    window - the GraphWin where the circle is drawn and the user clicks
    numRepeats - the number of times to repeat the user click and animation
    """
    
    for time in range(numRepeats):
        # the user picks the new center    
        destPoint = window.getMouse()
        # animate the circle to that new location
        animateCircle( circle, destPoint )


def animateCircle( circle, newCenter ):
    """
    Animates moving the circle from its current position to the
    new location.
    circle: the Circle object to be moved
    newCenter: the Point object where the circle should end up.
    """
    # what is the total distance we need to go, 
    # in both the x and y direction?
    centerPoint = circle.getCenter()

    changeInX = newCenter.getX() - centerPoint.getX()
    changeInY = newCenter.getY() - centerPoint.getY()
    # animate to that new position.
    for step in range(STEPS):
        circle.move(changeInX/STEPS, changeInY/STEPS)
        sleep(.01)

main()

# Animate moving a circle to the position clicked by the user 5 times.
# Refactored the program to use functions that we defined.
# by CSCI 111

from graphics import *
from time import sleep

STEPS = 100
NUM_TIMES = 5

def main():

    win = GraphWin("My Circle", 500, 500)
    
    centerPoint = Point(25, 25)
    circle = Circle(centerPoint, 25)
    circle.draw(win)
    
    anchorPoint = Point(win.getWidth()/2, 10)
    # tell the user that they need to click somewhere -- 
    instruction = Text( anchorPoint, "Click where you want the circle to go")
    instruction.draw(win)
    
    for time in range(NUM_TIMES):
        centerPoint = circle.getCenter()
        
        # the user picks the new center    
        destPoint = win.getMouse()
        
        # what is the total distance we need to go, 
        # in both the x and y direction?
        changeInX = destPoint.getX() - centerPoint.getX()
        changeInY = destPoint.getY() - centerPoint.getY()
        
        animateCircle( circle, changeInX, changeInY )
    
    win.getMouse()
    win.close()

def animateCircle( circle, dx, dy ):
    """
    Animate the circle, moving dx pixels in the x direction and
    dy pixels in the y direction, over STEPS steps.
    circle: the Circle object to be moved
    dx: an integer representing the number of pixels to move in the x direction,
    dy: an integer representing the number of pixels to move in the y direction.
    """
    for step in range(STEPS):
        circle.move(changeInX/STEPS, changeInY/STEPS)
        sleep(.01)

main()

# Mystery Program
# Used to demonstrate variable lifetimes and scope

def main():
    x = 10
    sum = sumEvens( x )
    print("The sum of even #s up to", x, "is", sum)

def sumEvens(limit):
    total = 0
    for x in range(0, limit, 2):
        total += x	
    return total

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 verse 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")

# prints a verse of Old MacDonald, plugging in the animal and sound
# parameters (which are strings), as appropriate.
def printVerse(animal, sound):
    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()


main()

# From How to Think Like a Computer Scientist textbook

def testEqual(actual, expected):
    if type(expected) == type(1):
        # they're integers, so check if exactly the same
        if actual == expected:
            print('Pass')
            return True
    elif type(expected) == type(1.11):
        # a float is expected, so just check if it's very close, to allow for
        # rounding errors
        if abs(actual-expected) < 0.00001:
            print('Pass')
            return True
    else:
        # check if they are equal
        if actual == expected:
            print('Pass')
            return True
    print('Test Failed: expected ' + str(expected) + ' but got ' + str(actual))
    return False

# Demonstrate testing sumEvens
# by CSCI111

import test

def main():
    test.testEqual( sumEvens( 10 ), 20)
    # what are other good tests?


def sumEvens(limit):
    """ Adds up the even numbers, up to but not including
    the limit (an integer).
    Returns that sum."""
    
    total = 0
    for x in range(0, limit, 2):
        total += x	
    return total

main()