Five weekends
The month of October in 2010 has five Fridays, five Saturdays, and five Sundays.
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You are encouraged to solve this task according to the task description, using any language you may know.
The task
- Write a program to show all months that have this same characteristic of five full weekends from the year 1900 through 2100 (Gregorian calendar).
- Show the number of months with this property.
- Show at least the first and last five dates, in order.
Java
<lang java>import java.util.Calendar; import java.util.GregorianCalendar;
public class FiveFSS {
//dreizig tage habt september... private static int[] month31 = {Calendar.JANUARY, Calendar.MARCH, Calendar.MAY, Calendar.JULY, Calendar.AUGUST, Calendar.OCTOBER, Calendar.DECEMBER}; public static void main(String[] args){ for(int year = 1900; year <= 2100; year++){ for(int month:month31){ Calendar date = new GregorianCalendar(year, month, 1); if(date.get(Calendar.DAY_OF_WEEK) == Calendar.FRIDAY){ //months are 0-indexed in Calendar System.out.println((date.get(Calendar.MONTH) + 1) + "-" + year); } } } }
}</lang> Output (middle results cut out):
3-1901 8-1902 5-1903 1-1904 7-1904 12-1905 3-1907 5-1908 1-1909 10-1909 7-1910 ... 12-2090 8-2092 5-2093 1-2094 10-2094 7-2095 3-2097 8-2098 5-2099 1-2100 10-2100