%
%
%  Input: Date
%  Output: the number of days in the month.
%
%
day=input('day ? ');
month=input('month ? ');
year=input('year ? ');
date=[num2str(day) '/' num2str(month)  '/'  num2str(year)];
disp(date);
logical_1=month == 1 | month == 3 | month==5 | month==7 | month==8;
logical_2=month==10 | month==12;

%

days=30; % default
if( logical_1 | logical_2)
   days=31;
end
%
if(month==2)
   if(rem(year,4)==0 & (~(rem(year,100)==0) | rem(year,400)==0))
      days=29;
   else
      days=28;
   end
end

   
disp(['number of days in the month: ' num2str(days)])