Topics : Case studies | Consumer goods industry supply chain | Demand planning/management | Supply Chain Planning software | Supply chain software | Transportation Management Systems.
Give an example of friend classes in C++ and an example of when you would use one. In C++, the friend keyword can be applied to either a function or a class. A friend function or friend class has access to the private members of the class in which the declaration occurs. There are programmers who think that this feature violates the principles of object oriented programming because it allows a class to operate on another classâs private members.
There is actaully a very simple reason why it is illegal. In C# it is legal to have a local variable that is the same as a class name. This means that if an instance member was to be named the same as static member there would be an ambiguity when a local variable had the same name as the class it represents. So consider the following legal C# code: public class TestClass.