#include <iostream>
 
enum Day {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday};
 
int main(int argc, char *argv[])
{
	for(int i = Monday; i <= Sunday; i++)
		std::cout<<static_cast<Day>(i)<<std::endl;
 
	for(Day d = Monday; d <= Sunday; d = static_cast<Day>(d+1))
		std::cout<<d<<std::endl;
 
	return 0;
}
			

• Cast integer to Day, static_cast<Day>(3)
• Cast Day to integer, int i = Thursday
• Math operation, day2 = static_cast<Day>(day1+1);
• ++ operator cannot be used with an enum variable

#include <iostream>
 
enum Day {Monday = 1, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday};
 
int main(int argc, char *argv[])
{
	for(int i = Monday; i <= Sunday; i++)
		std::cout<<static_cast<Day>(i)<<std::endl;
 
	return 0;
}
		

• An enumerator name can't be used in multiple enumerations within the same namespace
• Define the enumeration in a header, #include that header wherever needed if the enumeration is needed in mmultiple files

#include <iostream>
 
enum Day {Monday = 1, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday};
 
int main(int argc, char *argv[])
{
	if(1 == Monday)
		std::cout<<"Compare integer with Day ..."<<std::endl;
 
	if (Monday < Thursday)
		std::cout<<"Monday is earlier than Thursday ..."<<std::endl;
 
	return 0;
}
			

#include <iostream>
 
int main(int argc, char *argv[])
{
	enum Color {Blue, Red};
	enum Fruit {Banana, Orange};
 
	//enum types are implicitly converted to integer, then they are compared
	if (Blue == Banana)
		std::cout<<"Blue equals to Banana ..."<<std::endl;
 
	return 0;
}
			

#include <iostream>
 
int main(int argc, char *argv[])
{
	enum class Color {Blue, Red};
	enum class Fruit {Banana, Orange};
 
	//enum class types are not implicitly converted to integer
	//if (Color::Blue == Fruit::Banana)//compile error
		//std::cout<<"Blue equals to Banana ..."<<std::endl;
	Color c = Color::Blue;
	Fruit f = Fruit::Banana;
 
	std::cout<<static_cast<int>(c)<<std::endl;
	std::cout<<static_cast<int>(f)<<std::endl;
 
	return 0;
}
			

• enum type will be implicitly converted to integer
• enum class type will not be implicitly converted to integer

• learncpp.com
• Starting Out with C++, Tony Gaddis