In C++ a function contain in class called as

In C++ terminology, a function contained within a class is called a 'Member Function'. Member functions are functions that are defined inside a class definition and operate on the class's data members. They're also commonly referred to as 'methods', but the formal C++ term is 'member function'. 'Private Function' describes an access level, not the function type itself. 'Method Function' is redundant terminology, and 'Class' refers to the containing structure, not the function.