/* Sample of a very simple C++ class */
#include <iostream>     // included for cout, cin, etc.
using namespace std;

// begin class definition and implementation
class world
{
public:
  world()  { cout << "Hello World" << endl;  }  // ctor
  ~world() { cout << "Goodbye" << endl; }       // dtor
  void DoIt() { cout << "DoIt called\n"; }
private:
   // this part is not accessible from outside of world
}; // semicolon!!

world hello;                // declare an instance (called
                            // "hello") of the "world" class
// begin main program
int main()
{ 
  cout << "This is main." << endl;
  hello.DoIt();
}

// Program output:
//  Hello World
//  This is main.
//  DoIt called
//  Goodbye