Page 108 - DCAP404 _Object Oriented Programming

Unit 5: Static Members

You should see the following output. Notes
Enter the value of x
4
Display the entered number 4

There are also other areas of application for friend function. The friend function can also be
defined within the scope of a class definition itself. Friend function may also have inline member
functions. If the friend function is defined in the class, then the inline code substitution is done
automatically. But if defined outside the class, then it is necessary to precede the return type with
the keyword inline to make the inline code substitution.
The following program accesses the private data of a class through a friend function where the
friend function is defined with inline code substitution.

#include <conio.h>
class example
{
private:
int x;
public:

inline void getdata();
friend void disp(example);
};
inline void example::getdata()
{
cout <<“Enter the value of x “ << “\n”;
cin >> x;
}
inline void disp(example eg) //Note the use of the keyword inline

{
cout << “Display the entered number” << eg.x << “\n”;
}
main()
{
example eg1 ;
eg1.getdata();

disp(eg1);
getche();
}

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