Multilevel inheritance in C++

Multilevel inheritance:

• Multilevel inheritance has derived from the class itself and derives the subclass further.
• It means one base class derived from intermediate class, that intermediate class derived the derived class.

Syntax:

1. class a
   {
            //Base class
   }
   class b: class a
   {
            //Intermediate class
   
   
   }
   class c: class b
   {
             //Derived class
   }
   Object creation:
   last_class_name object_name;
   object_name.function(parameter list);

Example:

1. #include<iostream.h>
   #include<conio.h>
   class get_data //Base class
   {
   public:
   int pin;
   void get_value()
   {
   cout<<"\n\t Welcome to XXX Bank ";
   cout<<"\n\n Enter your pin number: ";
   cin>>pin;
   }
   };
   class compare: public get_data //Intermediate class
   {
   public:
   void compare_data()
   {
   if (pin==1234)
   {
             cout<<"\n Your pin number is valid. ";
   }
   else
   {
             cout<<"\n Your pin number is invalid. ";
   }
   }
   };
   class cash_withdrawal: public compare //Derived class
   {
   public:
   int amt;
   int cash;
   void get_cash()
   {
   amt=2000;
   if (pin==1234)
   {
   cout<<"\n\n Enter an amount for cash withdrawal: ";
   cin>>cash;
   amt=amt-cash;
   cout<<"\n Your current balance : "<<amt;
   }
   else
   {
             cout<<"\n Please enter correct pin number...";
   }
   }
   };
   void main()
   {
   clrscr();
   cash_withdrawal c;
   c.get_value();
   c.compare_data();
   c.get_cash();
   getch();
   }

Output:

If condition:

Else condition:

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