COMPUTER SCIENCE

Question

1. Write a class named Car that has the following data attributes:

a. __year_model (for the car’s year model) __make (for the make of the car) __speed (for the car’s current speed)

The Car class should have an __init__ method that accepts the car’s year model and make as arguments. These values should be assigned to the object’s __year_model and __make data attributes.

It should also assign 0 to the __speed data attribute.

The class should also have the following methods:

b. Accelerate: The accelerate method should add 5 to the speed data attribute each time it is called.

Brake: The brake method should subtract 5 from the speed data attribute each time it is called.

get_speed: The get_speed method should return the current speed

2. Write a class named Pet, which should have the following data attributes:

a. __name (for the name of a pet)

__animal_type (for the type of animal that a pet is. Example values are ‘Dog’, ‘Cat’, and ‘Bird’)

__age (for the pet’s age)

The Pet class should have an __init__ method that creates these attributes. It should also have the following methods:

b. set_name: This method assigns a value to the __name field.

set_animal_type: This method assigns a value to the __animal_type field.

set_age: This method assigns a value to the __age field.

get_name: This method returns the value of the __name field.

get_animal_type: This method returns the value of the __animal_type field.

get_age: This method returns the value of the __age field.

3. Write an Employee class that keeps data attributes for the following pieces of information:

a. Employee name

b. Employee number

Next, write a class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information:

c. Shift number (an integer,such as1 for morning shift, 2 for evening shift)

d. Hourly payrate

Write the appropriate accessor and mutator methods for each class.

4. Design a recursive function that accepts an integer argument, n, and prints every second number from n down to a minimum of 0. Assume that n is always a positive integer.

Answer 1

#####################################################

# Problem #1 : CAR CLASS

####################################################

import random

class Car:

def __init__(self, year, make):

self._year = year

self._make = make

self.speed=0

def getYear(self):

return(self._year)

def getMake(self):

return(self._make)

def getSpeed(self):

return(self.speed)

def Accelerate(self):

self.speed = self.speed+5

#should be some max speed that the car cannot exceed

def Brake(self):

self.speed = self.speed-5

if (self.speed<0):

self.speed=0

######################################################

def randomSpeed(car):

randSpeed = random.randint(25,100)

print(" speed goal = " + str(randSpeed))

while (randSpeed>car.getSpeed()):

car.Accelerate()

car.Brake()

print(car.getYear())

print(car.getMake())

print(car.getSpeed())

#####################################################

myCar = Car(2021,"Mitsubishi Mirage")

fancyCar = Car(2020,"Cadallac Escalade")

americanCar = Car(2021,"Chevy Cavalier")

randomSpeed(myCar)

randomSpeed(fancyCar)

randomSpeed(americanCar)

##################################################################################################

##################################################################################################

# PET CLASS

#################################################################################################

class Pet:

def __init__(self, petName, petType, petAge):

self.name = petName

self.type = petType

self.age = petAge

def GetName(self):

return(self.name)

def GetAge(self):

return(self.age)

def GetType(self):

return(self.type)

def SetAge(self,petAge):

self.age = petAge

def SetName(self,petName):

self.name = petName

# should not be allowed; how can you change

# for example, the dog into a cat?

def SetType(self,petType):

self.type = petType

def Dump(self):

print(self.name)

print(self.type)

print(self.age)

#############################################

myPet = Pet("Muffin","cat",0)

myPet.Dump()

myPet.SetAge(1)

myPet.Dump()

#####################################################

# ProductionWorker class inherits from Employee class

#####################################################

class Employee:

def __init__(self,empName,empNo):

self.employeeName = empName

self.employeeNum = empNo

def GetEmployeeName(self):

return (self.employeeName)

def GetEmployeeNumber(self):

return (self.employeeNum)

class ProductionWorker(Employee):

def __init__(self,shiftNo,hrWage,empName,empNo):

Employee.__init__(self,empName,empNo)

self.shiftNum = shiftNo

self.hourlyWage = hrWage

def GetShiftNum(self):

return(self.shiftNum)

def GetHourlyWage(self):

return(self.hourlyWage)

##############################################

worker = ProductionWorker(2,12,"Shina",11)

print(worker.GetEmployeeName())

print(worker.GetEmployeeNumber())

print(worker.GetShiftNum())

print(worker.GetHourlyWage())

########################################################

# COUNTDOWN BY 2

###################################################

def CountdownBy2( nStart, nStop):

if (int(nStart)<int(nStop)):

CountdownBy2(nStart+2,nStop)

print(nStart)

##########################################

n=-1

while (int(n)<0):

n = input("Please input the positive integer :>")

nStart = int(n)%2

CountdownBy2(nStart,n)