enum.cpp

#include <iostream>

enum class Color1 {
  red,
  blue,
  green
};

enum struct Color2: char{
  red= 100,
  blue, // 101
  green // 102
};

void useMe(Color2 color2){

  switch(color2){
  case Color2::red:
    std::cout << "Color2::red" << '\n';
    break;
  case Color2::blue:
    std::cout << "Color2::blue" << '\n';
    break;
  case Color2::green:
    std::cout << "Color2::green" << '\n';
    break;
  }

}


int main(){

  std::cout << '\n';

  std::cout <<  "static_cast<int>(Color1::red): " <<  static_cast<int>(Color1::red) << '\n';
  std::cout <<  "static_cast<int>(Color2::red): " <<  static_cast<int>(Color2::red) << '\n';

  std::cout << '\n';

  std::cout << "sizeof(Color1) = "  << sizeof(Color1) << '\n';
  std::cout << "sizeof(Color2) = "  << sizeof(Color2) << '\n';

  std::cout << '\n';

  Color2 color2Red{Color2::red};
  useMe(color2Red);

  std::cout << '\n';

}