W.A.P To find out the average of three no. Using friend function

#include<iostream.h>

#include<conio.h>

            class Sample {

                        int a,b,c;

            public:

            void getdata() {

                        cout<<"\nEnter 3 no's";

                        cin>>a>>b>>c;

            }

            friend float average(Sample obj);

            };

            float average(Sample obj) {

                        float avg;

                        avg=(obj.a+obj.b+obj.c)/3.0;

                        return(avg);

            }

            void main() {

                        clrscr();

                        Sample obj;

                        obj.getdata();

                        float avg=average(obj);

                        cout<<"\n\n\t\t Average  = "<<avg;

                        getch();

            }

OUTPUT:-

Enter 3 no's 90

80

70

                 Average  = 80