This document defines a C++ class named "waqar" with a constructor. The constructor prints the string "I am waqar hussain" when called. In the main function, an object of the waqar class is created, which automatically calls the constructor. The constructor is defined to run initialization code whenever an object of the waqar class is created.

1. #include<iostream>
using namespace std;
class waqar{
//i make class name of waqar
//& again the same name i make a function this is called constructor
public:
// i only declare this in class not define how we can define this in main let see
waqar();
};
// we can define this in main body or upper to main body both will work same
// to call function of class you want to declare that function return type (int or void)
// class name , ORS "::" and than function name
waqar::waqar(){
//here you can write any thing which you want Like
// i am waqar hussain
cout<<"I am waqar hussainn";
//when program run thid will automatic run
}
main()
{
// if you can use VB.Net or C# etc you about constructor that what is this
//in high languge we use this during loading form

2. //calling of constructor in maain body
// when we call function of class we create object and than through object we cal
// here in constructor when we create object than constructor will automatically cal let see
// calling of class : we write the name of class & than we create a value for this
waqar a;
//waqar a; is call the class and create object for this which is a through a i call different functon
of the class
}