Friend function.

Write a C++ program to find the mean value of a given number using friend function.

Program Algorithm:

Step 1: Include the header files

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.

Program Code in C++:

#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();

}

Program Output:

Enter two values: 100, 200

Mean Value is: 150