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.
A friend class declaration cannot define a new class (friend class X {}; is an error) When a local class declares an unqualified function or class as a friend, only functions and classes in the innermost non-class scope are looked up, not the global functions: