FRIEND FUNCTION PROGRAM

#include
#include
class data
{
int a,b;
public:
void get_value()
{
a=30;
b=55;
}
friend float mean(data s);
};
float mean(data s)
{
return float(s.a+s.b)/2;
}
void main()
{
clrscr();
data x;
x.get_value();
cout<<"\n Mean Value="<< mean(x);
getch();
}


Output will be:

Mean Value=42.5