SBUdaysInMonth

#include <iostream>

//1     2       3   4   5   6   7   |   8   9   10  11  12
//31    30(28)  31  30  31  30  31  |   31  30  31  30  31

//30 + ((month < 8) and (month % 2 !=0 ) or (month >= 8) and (month % 2 ==0)) + ((-2) * (month == 2))


//==
//!=
//>
//<
//>=
//<=
//!
//and
//or

int main()
{
    //int month{ 1 };
    int daysInMonth{0};
    int year{ 2020 };

    //((year % 400 == 0 ) or (year % 4 == 0 )) and ( year % 100 != 0)
    for (int month{ 1 }; month <= 12; ++month)
    {
        daysInMonth = 30 + (((month < 8) and (month % 2 != 0) or (month >= 8) and (month % 2 == 0)) + ((-2 + (((year % 400 == 0) or (year % 4 == 0)) and (year % 100 != 0))) * (month == 2)));
        std::cout << daysInMonth << ' ';
    }
    std::cout << '\n';
}