#include <iostream> 

enum COLORS
{
  BLACK,
  RED,
  BLUE,
  GREEN
};

enum MONTH
{
  JAN=1,
  FEB,
  MAR,
  APR,
  MAY,
  JUN,
  JUL,
  AUG,
  SEP,
  OCT,
  NOV,
  DEC
};

enum READY
{
  READY_NO,
  READY_YES
};

// bitfields can have any integral or enumeration types ... i.e. not floating point

// class or struct can be used with bitfields
struct Foo
{
  unsigned int color:2;
  unsigned int month:4;
  unsigned int ready:1;
};

int main(int argc, char** argv) 
{ 
  Foo f;

  f.color = GREEN;
  f.month = FEB;
  f.ready = READY_YES;

  std::cout << "Color: " << f.color << std::endl;
  std::cout << "Month: " << f.month << std::endl;
  std::cout << "Ready: " << (f.ready ? "READY" : "NOT READY") << std::endl;

  // 4 bytes on my machine where unsigned int is also 4 bytes
  std::cout << "SIZE: " << sizeof(f) << std::endl;

  return 0; 
}