// demonstation of a friend function
//
// you should get compilation errors (that's the whole point)!

#include <iostream.h>

// definition of the class foo, which has some private members
// and methods

class foo {
private:
  int private_int;
public:
  int public_int;

  // constructor
  foo() {
    cout << "I am foo!" << endl;
    private_int=10;
    public_int=20;
  }

  // destructor
  ~foo() {
    cout << "I am no more!" << endl;
  }

  int pubval(void) {
    return(public_int);
  }

private:
  
  int prival(void) {
    return(private_int);
  }

  friend void foofriend(void);
};

// -------------------------------------

// here is the friend function foofriend

void foofriend(void) {
  // local variable of type foo
  foo f;

  // first go for the public stuff
  cout << "member public_int is " << f.public_int << endl;
  cout << "method pubval is " << f.pubval() << endl;

  // now go for the private stuff
  cout << "private_int is " << f.private_int << endl;
  cout << "method prival is " << f.prival() << endl;
}

// this one is not a friend of foo!

void foofoe(void) {
  // local variable of type foo
  foo f;

  // first go for the public stuff
  cout << "member public_int is " << f.public_int << endl;
  cout << "method pubval is " << f.pubval() << endl;

  // now go for the private stuff
  cout << "private_int is " << f.private_int << endl;
  cout << "method prival is " << f.prival() << endl;
}

int main(void) {
  foofriend();
  foofoe();
}