Question

Can we describe functions in a struct? For example, is this code valid?

struct function {
  int func() { return 5; }
};

Answer 1

Yes, the only differences between a struct and class in C++ are:

In C++, a structure is a class defined with the struct keyword. Its members and base classes are public by default. A class defined with the class keyword has private members and base classes by default. This is the only difference between structs and classes in C++.