#include <iostream>
 #include <limits>

 enum struct Colour0: bool{
   red,     // 0
   blue     // 1
 };

 enum Colour1{
   red= -5,
   blue,      // -4
   green      // -3
 };

 enum struct Colour2: char{
   red= 100,
   blue, // 101
   green // 102
 };

 enum class Colour3: long long int{
   red=  std::numeric_limits<long long int>::min(),
   blue= std::numeric_limits<long long int>::min() + 1,
   green= std::numeric_limits<long long int>::min() + 2
 };

 int main(){

   std::cout << std::endl;

   std::cout << "sizeof(Colour0)= "  << sizeof(Colour0) << std::endl;
   std::cout << "sizeof(Colour1)= "  << sizeof(Colour1) << std::endl;
   std::cout << "sizeof(Colour2)= "  << sizeof(Colour2) << std::endl;
   std::cout << "sizeof(Colour3)= "  << sizeof(Colour3) << std::endl;

   std::cout << std::endl;

   std::cout << "Colour0::red: " << static_cast<bool>(Colour0::red) << std::endl;
   std::cout << "red: " << red << std::endl;
   std::cout << "Colour2::red: " << static_cast<char>(Colour2::red) << std::endl;
   std::cout << "Colour3::red: " << static_cast<long long int>(Colour3::red) << std::endl;

   std::cout << std::endl;

 }