#------------------------------------------------------------
# Review questions for Midterm #1
#------------------------------------------------------------

#------------------------------------------------------------
# What is printed by:
#   Q3(3,6,2)
#   Q1(1,2,3)
#   Q1(1,2)
#   Q2(4,5,6)
#------------------------------------------------------------

def Q1 (X,Y,Z=5):
    print X + Y * Z
    return
    
def Q2 (Z,X,Y):
    Q1 (Y,Z,X)
    return
    
def Q3 (Z,Y,X):
    Q1 (Y,Z)
    Q2 (X,Z,Y)
    return
    
#------------------------------------------------------------
# How do I write to a file?
#   Figure out a file name
#   Open a file handle with write-access ("w")
#   Write stuff to the file (use \n for line breaks)
#   Close the file handle
#------------------------------------------------------------

def WriteToAFile ():
    Filename = pickAFolder() + "MyFile.txt"
    MyFile = open(Filename, "w")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.write("New stuff\n")
    MyFile.close()
    return
    
#------------------------------------------------------------
# How do I transform an image?
#   Figure out a file name
#   Load in the image
#   For each row (Y)
#       For each column in the current row (X)
#           Get access to the pixel at coordinate <X,Y>
#           Do funky things with the pixel's colors
#       Refresh the screen after every line
#------------------------------------------------------------
    
def LoadAnImage():
    Filename = pickAFile()
    Canvas = makePicture(Filename)
    show(Canvas)
    for Y in range(getHeight(Canvas)):
        for X in range(getWidth(Canvas)):
            PX = getPixel(Canvas,X,Y)
            setRed(PX, getRed(PX)+50)
            setGreen(PX, getGreen(PX)+50)
            setBlue(PX, getBlue(PX)+50)
        repaint(Canvas)    
    return