Contents:

• Overview
• Problems to be Submitted
• Extra Credit

Topic: Defining a Class
Related Reading: Notes from class
Due: 1:10pm, Tuesday 27 September 2005

Please make sure you adhere to the policies on academic integrity.

1. (10 points)

   Below is the for a class Radio, similar to the Television class described during lecture. Unfortunately, it doesn't work. There are five errors in this class declaration. Find all the errors and correct them. (Do not worry about volume or stations being set too high or too low.)

    1        class Radio():
    2	
    3            def init(self):
    4                self.powerOn = False
    5                self.volume = 5
    6                self.station = 88.1
    7                self.presets = [ 88.1, 92.1, 96.1, 101.1, 104.1 ]
    8                
    9            def togglePower(self):
   10                self.powerOn = not self.powerOn
   11                
   12            def setPreset(self, ind):
   13                self.presets[ind] = station
   14                
   15            def gotoPreset(self, ind):
   16                self.station = self.presets[ind]
   17                
   18            def increaseVolume(self):
   19                self.volume = self.volume + 1
   20                
   21            def decreaseVolume(self)
   22                self.volume = self.volume - 1
   23                
   24            def increaseStation(self):
   25                self.station = self.station + .2
   26                
   27           def decreaseStation(self):
   28               self.station = self.station - .2