Question

Explain what classes and objects are in object - oriented programming. Give an example of each and explain how they work together in a computer program.

Answer 1

In object oriented programming language, class is a user defined data type and it is a blueprint of creating objects i.e set of instructions to build an object and class holds data members and member functions.

where object is an instance of a class, generally when we create a class there is no memory allocaion occurs but when a object is created which is also called class is instantiated there it allocates memory. through object we can access data members and member functions of a class outside of it .

generally we create a class as:

class Classname

{

//members

}

where class is keyword.

and we create object as : Classname objectName;

we can access data members of class throgh "." operator as objectName.member function()

Example:

#include <iostream>
using namespace std;
#include <bits/stdc++.h>

using namespace std;

class C
{
public: //Access specifier
  
string Name; //data members
  
void Print()
{
cout<<"My Name is "<< Name;
}

};

int main()
{
C obj;

obj.Name="Alexa"; //Accessing data members

obj.Print(); //Accessing member function

return 0;
}

output: