Write a c++ program to find out the sum of an A.P. series by using the friend function.
If we declare a function
friend int show(T4Tutorials_AP_Series); as a friend in a class
T4Tutorials_AP_Series then this function
int show(T4Tutorials_AP_Series); can access the private and protected members of the class
T4Tutorials_AP_Series. You must know that a global function can also be declared as a friend function of the class.
Syntax of friend function in C++
friend return_type function_name(arguments);