Python Programming – John Zelle: Chapter 4 ex. 6
Modify the graphical future value program so that the input (principal and apr) also are done in a graphical fashion using Entry objects.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | #Modify the graphical future value program so that the input (principal and apr) # also are done in a graphical fashion using entry points. from graphics import * def main(): #Create a graphics window with labels on the left edge. win = GraphWin("Investment Growth Chart", 600, 460) win.setBackground("white") win.setCoords(-1.75,-9000,11.5,15400) #introduction Text(Point(4.0, 14000),"Future Value Calculator").draw(win) #principal input Text(Point(1.0, -4000), "Input Starting Principal").draw(win) inputP = Entry(Point(3,-4000),6) inputP.setText("0") inputP.draw(win) #intrest input Text(Point(6, -4000), "Input Interest Rate (0.05 eg)").draw(win) inputQ = Entry(Point(8.2,-4000),6) inputQ.setText("0") inputQ.draw(win) #create calc button button = Rectangle(Point(2,-6000),Point(8,-8000)) button.setFill("red") button.draw(win) buttontxt = Text(Point(5,-7200),"Calculate:") buttontxt.draw(win) win.getMouse() #recieve input p = eval(inputP.getText()) q = eval(inputQ.getText()) #labels Text(Point(-1,0), ' 0.0K').draw(win) Text(Point(-1, 2500), ' 2.5K').draw(win) Text(Point(-1, 5000), ' 5.0K').draw(win) Text(Point(-1, 7500), ' 7.5K').draw(win) Text(Point(-1, 10000), ' 10.0K').draw(win) # the first years bar = Rectangle(Point(0,0),Point(1,p)) bar.setFill('green') bar.setWidth(2) bar.draw(win) for i in range(1,11): #count 1-10 p = p*(1+q) bar= Rectangle(Point(i,0),Point(i+1,p)) bar.setFill('Green') bar.setWidth(2) bar.draw(win) buttontxt.setText('Quit.') win.getMouse() # pause for click in window win.close() main() |
Run =
Hey I’ve found these exercise walk throughs incredibly helpful. Any chance you have more of them pat Chapter 4 ex. 6?