This document discusses classes in C++. It explains that classes combine functions and data members and can be private, public, or protected. Private members are only accessible within the class, while public members can be accessed outside the class, such as through public functions. An example class is provided with a private data member, public function to access it, and use of the class within a main function by creating an object and calling the public function.

1. #include <iostream>
using namespace std;
//Class is the combination of function & data members
//Class are 3 types
/*
1 Private
2 Public
3 Protect
If we write or not write Private this is By default
like keywords
Private is only accessable only in Class
Private is accessable only by Public
*/
class waqar {
//there i write or not Private it means that there is private
private:
//declaration of data type or meber or data members
// like
int a;
//to access int a; we Use Public
public:
//we can'nt use this type of sentance here
// In class we can only use Function & data members
//here you can write your own sentance
//Like
//cout<<"Enter your Roll Numbern";
//Here we Use cin keyword to get data from Keyboard
//cin>>a;
//Make your Function
//Like
int waqar1()
//I make fuction Name of waqar1
{
cout<<"Enter your roll Non";
cin>>a;
}
};
//Use main function
main()
{
//Here you can declare this class you can make
waqar wq;
//wq is called object
//Calling of class you need object
wq.waqar1();
//this is hole Program of using class
}