How to organize such a record using a class?

Question

C++ / C#

I want to make a conclusion for the fan as in C#. // System is the class name

System.out.printIn("Hello");

Answer 1

System is a global class instance that contains an out member that has a println method.

class SystemType {
public:
  class Out {
      public: void println() {
          cout << "haha";
      }   
  } out;
} System;