Skuddår - Løsning

function days = daysInMonth(monthNumber)
switch(monthNumber)
    case {1, 3, 5, 7, 8, 10, 12}
        days = 31;
    case {4, 6, 9, 11}
        days = 30;
    case 2
        days = 28;
    otherwise
        days = 0;
end
end

function bool = isLeapYear(year)
bool = year > 0 && mod(year, 4) == 0 &&  (~mod(year, 100) == 0 || mod(year, 400) == 0);
end

function days = daysInMonth(monthNumber, year)
switch (monthNumber)
    case {1, 3, 5, 7, 8, 10, 12}
        days = 31;
    case {4, 6, 9, 11}
        days = 30;
    case 2
        days = 28 + isLeapYear(year);
    otherwise
        days = 0;
end
end