Define a Course base class with attributes number and title. Define a print_info() method that displays the course number and ti
tle.
Also define a derived class OfferedCourse with the additional attributes instructor_name, term, and class_time.
Ex: If the input is:
ECE287
Digital Systems Design
ECE387
Embedded Systems Design
Mark Patterson
Fall 2018
WF: 2-3:30 pm
the output is:
Course Information:
Course Number: ECE287
Course Title: Digital Systems Design
Course Information:
Course Number: ECE387
Course Title: Embedded Systems Design
Instructor Name: Mark Patterson
Term: Fall 2018 Class
Time: WF: 2-3:30 pm
Also define a derived class OfferedCourse with the additional attributes instructor_name, term, and class_time.
Ex: If the input is:
ECE287
Digital Systems Design
ECE387
Embedded Systems Design
Mark Patterson
Fall 2018
WF: 2-3:30 pm
the output is:
Course Information:
Course Number: ECE287
Course Title: Digital Systems Design
Course Information:
Course Number: ECE387
Course Title: Embedded Systems Design
Instructor Name: Mark Patterson
Term: Fall 2018 Class
Time: WF: 2-3:30 pm
1 answer:
Answer:
Here is the Python program:
class Course:
def __init__(self,number, title):
self.number = number
self.title = title
def print_info(self):
print("Course Information:")
print("Course Number:", self.number)
print("Course Title:", self.title)
class OfferedCourse(Course):
def __init__(self, number, title,instructor_name,term,class_time):
self.number = number
self.title = title
self.instructor_name = instructor_name
self.term = term
self.class_time=class_time
if __name__ == "__main__":
course_number = input()
course_title = input()
o_course_number = input()
o_course_title = input()
instructor_name = input()
term = input()
class_time = input()
my_course = Course(course_number, course_title)
my_course.print_info()
my_offered_course = OfferedCourse(o_course_number, o_course_title, instructor_name, term, class_time)
my_offered_course.print_info()
print('Instructor Name:', my_offered_course.instructor_name)
print('Term:', my_offered_course.term)
print('Class Time:', my_offered_course.class_time)
Explanation:
Course is a base class with attributes number and title. It has a print_info() method that displays the course number and title.
self keyword is the keyword which is used to easily access all the instances defined within a Course class, including its method and attributes number and title.
__init__ is a constructor which is called when an instance is created from the Course, and access is required to initialize the attributes number and title of Course class.
OfferedCourse is a class which is derived from base class Course. In addition to attributes number and title, it has attributes attributes instructor_name, term, and class_time.
A special attribute __name__. The value of __name__ attribute is set to “__main__” in order to run this module as a main program. In this main program input() method is used to take input from user. The input is the course number, title, instructor name, term and class time. The object my_course of Course class is created and the constructor of Course class is called passing the course_number and course_title using this object to access the attributes (member variables number and term) of the Course class. Next the instance my_course is used to call function print_info() of Course class.
The object my_offered_course of OfferedCourse class is created and the constructor of OfferedCourse class is called passing the o_course_number, o_course_title, instructor_name, term, class_time using this object to access the attributes number, title, instructor_name,term, class_time OfferedCourse class. Next the instance my_offered_course is used to call function print_info() of Course class. Here it is to be noticed that the derived class OfferedCourse uses the method print_info() of its base class Course. Last three print statements of the main program use object my_offered_course to access the attributes instructor_name, term and class_time of class OfferedCourse to display the their values.
The screenshot of the program output is attached.
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Answer:
Here is the copy assignment operator for CarCounter:
CarCounter& CarCounter::operator=(const CarCounter& objToCopy) {
carCount = objToCopy.carCount;
return *this; }
The syntax for copy assignment operator is:
ClassName& ClassName :: operator= ( ClassName& object_name)
In the above chunk of code class name Is CarCounter and object name is objToCopy.
Assignment operator = is called which assigns objToCopy.carCount to the new objects's carCount.
This operator basically is called when an object which is already initialized is assigned a new value from another current object.
Then return *this returns the reference to the calling object
Explanation:
The complete program is:
#include <iostream> //to use input output functions
using namespace std; //to access objects like cin cout
class CarCounter { //class name
public: // public member functions of class CarCounter
CarCounter(); //constructor of CarCounter
CarCounter& operator=(const CarCounter& objToCopy); //copy assignment operator for CarCounter
void SetCarCount(const int setVal) { //mutator method to set the car count value
carCount = setVal; } //set carCount so setVal
int GetCarCount() const { //accessor method to get carCount
return carCount; }
private: //private data member of class
int carCount; }; // private data field of CarCounter
CarCounter::CarCounter() { //constructor
carCount = 0; //intializes the value of carCount in constructor
return; }
// FIXME write copy assignment operator
CarCounter& CarCounter::operator=(const CarCounter& objToCopy){
/* copy assignment operator for CarCounter that assigns objToCopy.carCount to the new objects's carCount, then returns *this */
carCount = objToCopy.carCount;
return *this;}
int main() { //start of main() function
CarCounter frontParkingLot; // creates CarCounter object
CarCounter backParkingLot; // creates CarCounter object
frontParkingLot.SetCarCount(12); // calls SetCarCount method using object frontParkingLot to set the value of carCount to 12
backParkingLot = frontParkingLot; //assigns value of frontParkingLot to backParkingLot
cout << "Cars counted: " << backParkingLot.GetCarCount(); //calls accessor GetCarCount method to get the value of carCount and display it in output
return 0; }
The output of this program is:
Cars counted = 12
