Question

In this module you learned about Object-Oriented programming in C++ and how to combine this approach with the concepts covered in previous modules

For this assignment you will write a class called Dog that has the following member variables:

• birthyear. An int that holds the dog’s birth year.
• breed. A string that holds the breed of dog.
• vaccines. A Boolean holding a yes/no value indicating whether the dog is currently on vaccinations.

In addition, the class should have the following member functions:

• Constructor. The constructor should accept the dog’s birthyear, breed and vaccines as arguments and assign these values to the object’s birthyear, breed and vaccines member variables.
• Accessors. Appropriate accessor functions should be created to allow values to be retrieved from an object’s birthyear, breed and vaccinesmember variables.

Demonstrate the class in a program that creates a Dog object. The user should enter all input. Be sure to include comments throughout your code where appropriate.

Answer 1

Dear Student,

Thanks for posting an interesting question of OOPS concepts in C++.

So, for the given question. I have created a complete program and created Dog.cpp file having Dog class.

1. Please find below complete Dog class screenshot with proper comments to each line of the code.

2. Please find complete program in text format with proper comments to each line of the code:-

#include<iostream>

//for getting Stream size value used for flushing the console stream buffer
#include<ios>
  
//for getting numberic limits value used for flushing the console stream buffer
#include<limits>

using namespace std;

//Declaration of Class Dog
class Dog {

//Declaring three private variables birthYear, breed and vaccines
private :
int birthYear;
string breed;
bool vaccines;

public:

   //Constructor to initalize the instance variables of Dog class
   Dog(int birthYear_constrcut, string breed_construct, bool vaccines_construct){
birthYear = birthYear_constrcut;
breed = breed_construct;
       vaccines = vaccines_construct;
}

   //Accessor to get Birth year
   int getBirthYear(){
       return birthYear;
   }
  
   //Accessor to get breed
   string getBreed(){
       return breed;
   }
  
   //Accessor to get Vaccines
   bool getVaccines(){
       return vaccines;
   }
};
int main(){  
   //Declaring three variables birthYear, breed and vaccines to store input from the user
   int birthYear;
   string breed;
   bool vaccines;
  
   //Inputting all the parameters i.e. birthYear, breed and vaccines
   cout<<"Enter dog's birth year ";
   cin>>birthYear;
   //Below line will remove \n i.e. new line from the stream buffer so that it's value not copied to the breed variables
   //Mainly it is for flushing the buffer
   cin.ignore(numeric_limits<streamsize>::max(),'\n');
   cout<<"Enter dog's breed ";
   getline(cin,breed);
   cout<<"Enter dog's vaccines 1 for yes and 0 for no ";
   cin>>vaccines;
  
   //Creating Dog d object
   Dog d(birthYear, breed, vaccines);
  
   //Printing Dog d object details accessing using the accessors of the Dog class
   cout<<"Entered dog details are:\nBirth Year-"<<d.getBirthYear()<<", Breed-"<<d.getBreed()<<", Vaccines-";  
   if(d.getVaccines()){
       cout<<"Yes";
   }else{
       cout<<"No";
   }
}

3. Please find output screenshot of the above program after taking input from the user:-

4. The important part of the code is to creation of Dog class and to print the message and initializing Dog object using constructor. That part I marked in bold.

5. Please note that I put main method inside the same Dog.cpp file for demonstration of the Dog class.

6. Though I put comments to each line of the code. Still if you have any query please feel free to reach me through comments section. I will be more than happy to help you further.

7. If you like my answer, please upvote it by pressing thumb's up button.

Thanks!!

Happy Learning!!