Question

SOLVE IN PYTHON:

Exercise #2: Design and implement class Radio to represent a radio object. The class defines the following attributes (variables) and methods:

Assume that the station and volume settings range from 1 to 10.

A private variable of type int named station to represent a station number. Set to 1.

A private variable of type int named volume to represent the volume setting. Set to 1.

A private variable of type boolean named on to represent the radio on or off. Set to false.

A non-argument constructor method to create a default radio.

Method getStation() that returns the station.

Method getVolume() that returns the volume.

Method turnOn() that turns the radio on.

Method turnOff() that turns the radio off.

Method stationUp() that increments the station by 1 only when the radio is on.

Method stationDown() that decrements the station by 1 only when the radio is on.

Method volumeUp() that increment the volume by 1 only when the radio is on.

Method volumeDown() that decrements the volume by 1 only when the radio is on.

Method toString()to printout a meaningful description of the radio as follows(if the radio is on):

The radio station is X and the volume level is Y. Where X and Y are the values of variables station and volume. If the radio is off, the message is: The radio is off.

Now design and implement a test program to create a default radio object and test all class methods on the object in random order. Print the object after each method call and use meaningful label for each method call as shown in the following sample run.

Sample run:

Turn radio on:

The radio station is 1 and the volume level is 1.

Turn volume up by 3:

The radio station is 1 and the volume level is 4.

Move station up by 5:

The radio station is 6 and the volume level is 4.

Turn volume down by 1:

The radio station is 6 and the volume level is 3.

Move station up by 3:

The radio station is 9 and the volume level is 3.

Turn radio off.

The radio is off.

Turn volume up by 2: The radio is off.

Turn station down by 2: The radio is off.

Answer 1

Program:

class Radio:
def __init__(self, station, volume,radio):
self.station = station
self.volume = volume
self.radio = radio
  
def getStation():
return self.station
  
def getVolume():
return self.volume

def turnOn(self):
self.radio = True
  
def turnOff(self):
self.radio = False
  
def stationUp(self,num):
self.station = self.station + num
  
def stationDown(self,num):
self.station = self.station - num
  
def volumeUp(self,num):
self.volume = self.volume + num
  
def volumeDown(self,num):
self.volume = self.volume - num
  
def toString(self):
return 'The radio station is',self.station,'and the volume level is',self.volume,'.'
  
radioObj = Radio(1,1,False)

print("Turn radio on")
radioObj.turnOn()
print(radioObj.toString())

print("Turn volume up by 3:")
radioObj.volumeUp(3)
print(radioObj.toString())

print("Move station up by 5:")
radioObj.stationUp(5)
print(radioObj.toString())

print("Turn volume down by 1:")
radioObj.volumeDown(1)
print(radioObj.toString())

print("Move station up by 3:")
radioObj.stationUp(3)
print(radioObj.toString())

print("Turn radio off.")
radioObj.turnOff()
print("The radio is off")

print("Turn volume up by 2: ")
if(radioObj.radio==False):
print("The radio is off.")
else:
radioObj.volumeUp(2)
print(radioObj.toString())

print("Turn station down by 2: ")
if(radioObj.radio==False):
print("The radio is off.")
else:
radioObj.stationDown(2)
print(radioObj.toString())

  

Output:

rn radio on ('The radio station is', 1, 'and the volume level is', 1, '.') n vo Lume up Dy3 ('The radio station is', 1, 'and the volume level is. 4, '.') ve station up by 5: ('The radio station is. 6, ' and the volume level is. 4, '.') rn volume down by 1: ('The radio station is. 6, 'and the volume level is. 3, '.') Move station up bv 3: ('The radio station is. 9, 'and the volume level is. 3, '.') Turn rad10 olI. he radio is off rn volume up by 2: he radio is off. rn station down by 2: he radio is off.

class Radio: def init(self, station, volume, radio): selT.stationstation self.volumevolume self.radioradio def getStation(): return self.station def getVolume): return self.volume def turnOn (self): self.radioTrue def turnOff (self) self.radioFalse def stationUp (self,num): self.stationself.station+num def stationDown(self,num): self.stationself.stationnum def volumeUp (self, num): self.volumeself.volume + num

def volumeDown(self, num): self.volumeself.volume- num def toString(self): return 'The radio station is',self.station, 'and the volume level is',self.volume,".' radioobj Radio (1,1, False) print("Turn radio on") radioObj.turnOn() print (radioobj.toString)) print("Turn volume up by 3:" radioObj.volumeUp (3) print (radioobj.toString)) print ("Move station up by 5:" radioObj.stationUp (5) print (radioobj.toString)) print("Turn volume down by 1:") radioobj.volumeDown (1) print (radioobj.toString)) print("Move station up by 3:") radioObj.stationUp (3) print (radioobj.toString))

print("Turn radio off." radioObj.turnOff) print("The radio is off") print("Turn volume up by 2:") if(radio0bj.radio--False): print("The radio is off.") eise radioobj.volumeUp (2) print (radioobj.toString()) print("Turn station down by 2: ") if(radio0bj.radio--False): print ("The radio is off." eise radioobj.stationDown (2) print (radioobj.toString())