Reference another class in member function : class hierarchy « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. class hierarchy

#include <iostream>
using namespace std;

class ClassA {

public:
    void functionA();
};

void ClassA::functionA()
{
  cout << "This is a function in ClassA \n";

}

class ClassB {

public:
    void functionB();
};

void ClassB::functionB() {
  ClassA myclass;
  myclass.functionA();
}

int main() {
  ClassB myclass;
  ClassA anotherclass;

  myclass.functionB();
  anotherclass.functionA();

  return 0;
}

This is a function in ClassA
This is a function in ClassA