#include
using namespace std;
enum days_of_week { Sun, Mon, Tue, Wed, Thu, Fri, Sat };
int main() {
days_of_week day1, day2;
day1 = Mon;
day2 = Thu;
int diff = day2 - day1;
cout << "Days between = " << diff << endl;
if(day1 < day2)
cout << "day1 comes before day2\n";
return 0;
}