Simple Program for Friend Function Using C++ Programming

To find the mean value of a given number using friend function.

ALGORITHM:

STEP 1:  Start the program.
STEP 2:  Declare the class name as Base with data members and member functions.
STEP 3:  The function get() is used to read the 2 inputs from the user.
STEP 4:  Declare the friend function mean(base ob) inside the class.
STEP 5:  Outside the class to define the friend function and do the following.
STEP 6:  Return the mean value (ob.val1+ob.val2)/2 as a float.
STEP 7:  Stop the program.

#include<iostream.h>




#include<conio.h>




class  base




{

    int val1,val2;




   public:




    void get()

    {

       cout<<"Enter two values:";




       cin>>val1>>val2;

    }

    friend float mean(base ob);

};




float mean(base ob)

{

   return float(ob.val1+ob.val2)/2;

}




void main()




{

    clrscr();




    base obj;




    obj.get();




    cout<<"\n Mean value is : "<<mean(obj);




    getch();

}      







Output:

Enter two values: 10, 20
Mean Value is: 15

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