cppDaysInMonthFull

#include <iostream>

//  1   2   3   4   5   6   7   #   8   9   10  11  12
//  31  30  31  30  31  30  31  #   31  30  31  30  31
//  month < 8                       month >= 8
//  month % 2 != 0                  month % 2 == 0
//  ((month < 8) and (month % 2 != 0)) or ((month >= 8) and (month % 2 == 0)) + ((month == 2)*(-2))
// (month == 2)*(-2)
int main()
{
    int days{ 30 };
    int month;
    int year;

    std::cout << "Enter month:";
    std::cin >> month;

    std::cout << " Enter year";
    std::cin >> year;

    bool leapYear{ (((year % 400 == 0) or (year % 4) == 0) and ((year % 100) != 0)) };

    days += (((month < 8) and (month % 2 != 0)) or ((month >= 8) and (month % 2 == 0))) + ((month == 2)*(-2)+leapYear) ;
    std::cout << "There are " << days << " in " << month << " month\n";
}