Saint Louis University |
Computer Science 1300
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Computer Science Department |
Ensure that you adhere to the policies on academic integrity.
In a moment, we propose an implementation for a Radio class. For this problem, please do not focus on whether or not this is an accurate model for the semantics of a radio. Instead, our primary concern is that there are five critical mistakes with the implementation that lead to explicit errors.
You are to identify these five errors and for each:
Our implementation can be download electronically (code here), if you wish to experiment, or is displayed as follows (line numbers only for reference).
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class Radio:
def init(self):
self._powerOn = False
self._volume = 5
self._station = 90.7
self._presets = [ 90.7, 92.3, 94.7, 98.1, 105.7, 107.7 ]
def togglePower(self):
self._powerOn = not self._powerOn
def setPreset(self, ind):
self._presets[ind] = _station
def gotoPreset(self, ind):
self._station = self._presets[self._ind]
def increaseVolume(self):
self._volume = self._volume + 1
def decreaseVolume(self):
self._volume = self._volume - 1
def increaseStation(self)
self._station = self._station + .2
def decreaseStation(self):
self._station = self._station - .2
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