// Example 3-10: Comparing pointers
#include <ios>
#include <iostream>
#include <ostream>

struct Demo {
  int x;
  int y;
};

union U {
  int a;
  double b;
  char c[5];
  Demo d;
};

int main()
{
  Demo demo[10];
  std::cout << std::boolalpha;
  // Everything prints "true"
  std::cout << (&demo[0]   < &demo[2])   << '\n';
  std::cout << (&demo[0]   == demo)      << '\n';
  std::cout << (&demo[10]  > &demo[9])   << '\n';
  std::cout << (&demo[0].x < &demo[0].y) << '\n';

  U u;
  std::cout << (&u.d == static_cast<void*>(u.c)) << '\n';
  std::cout << (&u.a == static_cast<void*>(&u.b)) << '\n';
}