How to use enums in C++

Question

Suppose we have an enum like the following:

enum Days {Saturday, Sunday, Tuesday, Wednesday, Thursday, Friday};

I want to crea

Answer 1

If we want the strict type safety and scoped enum, using enum class is good in C++11.

If we had to work in C++98, we can using the advice given by InitializeSahib,San to enable the scoped enum.

If we also want the strict type safety, the follow code can implement somthing like enum.

#include 
class Color
{
public:
    static Color RED()
    {
        return Color(0);
    }
    static Color BLUE()
    {
        return Color(1);
    }
    bool operator==(const Color &rhs) const
    {
        return this->value == rhs.value;
    }
    bool operator!=(const Color &rhs) const
    {
        return !(*this == rhs);
    }

private:
    explicit Color(int value_) : value(value_) {}
    int value;
};

int main()
{
    Color color = Color::RED();
    if (color == Color::RED())
    {
        std::cout << "red" << std::endl;
    }
    return 0;
}

The code is modified from the class Month example in book Effective C++ 3rd: Item 18