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++
class class_name
{
…
friend return_type function_name(arguments);
…
}
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