Multiple inheritances in C++

 Multiple inheritances:

• Multiple inheritances have a number of base classes and one derived class.
• It means the numbers of base classes are derived from one derived class.

Syntax:

1. class a

   {

             //Base class1

   };

   class b

   {

             //Base class2

   };

   class c:public a,public b

   {

             //Derived class

   };

   //Object creation

   Derived_class_name object_name;

   object_name.function_name();

Example:

1. #include<iostream.h>

   #include<conio.h>

   class first //Base class1

   {

   public:

   int num1;

   void get_1st_value()

   {

   cout<<"\n Enter first value: ";

   cin>>num1;

   }

   };

   class second //Base class2

   {

   public:

   int num2;

   void get_2nd_value()

   {

   cout<<"\n Enter Second value: ";

   cin>>num2;

   }

   };

   class add: public first, public second //Derived class

   {

   public:

   int num3;

   void operation()

   {

   num3=num1+num2;

   }

   void display()

   {

   cout<<"\n \n Output:";

   cout<<"\n \n First number = "<<num1;

   cout<<"\n \n Second number = "<<num2;

   cout<<"\n \n First number + Second number =  "<<num3;

   }

   };

   void main()

   {

   clrscr();

   add a;

   a.get_1st_value();

   a.get_2nd_value();

   a.operation();

   a.display();

   getch();

   }

Output:

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