This C++ code defines three classes - Waqar, Hussain, and Syed - where Syed inherits from Hussain and Hussain inherits from Waqar. It also defines a main function that creates an object of class Syed and calls methods from all three classes to output text to the console.

1. #include<iostream>
using namespace std;
class waqar{
public:
void a1(){
cout<<"i am waqar";
}
void n();
};
void waqar::n(){
cout<<"new group";
}
class hussain: public waqar{
public:
void a2(){
cout<<"i am hussain";}
protected:
int a,b,c;
public:
void w(){
cout<<"my name is khan";
cin>>a>>b>>c;
}
};

2. class syed: public hussain{
public:
void a3(){
cout<<"i am syed";
}
};
main()
{
syed abc;
abc.a1();
abc.a2();
abc.a3();
abc.w();
abc.n();
}