# include <stdbool.h>

bool leap_year ( int year );


int month_length ( int month, int year )
{
  int days;

  if ( month == 4 || month == 6 || month == 9 || month == 11 )
  {
    days = 30; 
  }
  else if ( month == 2 )
  {
    if ( leap_year ( year ) )
    {
      days = 29;
    }
    else
    {
      days = 28;
    }
  }
  else
  {
    days = 31;
  }

  return days;
}