Перечисления enum C++ пример

Пример использования перечисления enum в C++

#include <iostream>
using namespace std;

enum days_week {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday};

int main()
{
    setlocale(LC_ALL, "Rus");
    int x;
    days_week day1;
    day1 = Monday;
    days_week day2= Friday;
    //days_week day2= days_week::Friday;
    x = day2 - day1;
    cout << day1 << endl; // 1
    cout << day2 << endl; // 5
    cout << x << endl;  // 4

    system("pause");
}

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