In which year was the date the same as the original year?
- by Marta
It's my first question on this site, but I always found this site really useful.
What I mean with my question is:
you ask the person to give a date (eg. Fill in a date [dd-mm-yyyy]:
16-10-2013)
you than have to ask an interval between 2
years (eg. Give an interval [yyyy-yyyy]:1800-2000)
When the program runs, it has to show what day of the week the given date is. In this case it was a Wednesday. Than the program has to look in which year, in between the interval, the date 16 October also fell on a Wednesday.
So in the end it has to look something like this:
Fill in a date: [dd-mm-yyyy]: 16-10-2013
Give an interval [yyyy-yyyy]: 1900-2000
16 October was a wednesday in the following years:
1905 1911 1916 1922 1933 1939 1944 1950 1961 1967 1972 1978 1989 1995 2000
The full date is Wednesday 16 October, 2013
The small (or biggest) problem is, I am not allowed to use the DATE.function in java.
If someone can help me with the second part I would be really really happy, cause I have no idea how I am supposed to do this
To find out what day of the week the given date falls, I use the Zeller Congruence
class Day {
Date date; //To grab the month and year form the Date class
int day;
final static String[] DAYS_OF_WEEK = {
"Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
"Friday"
};
public void dayWeekInterval{
//code to grab the interval from interval Class, and doing stuff here
}
public void dayOfTheWeek {
int m = date.getMonth();
int y = date.getYear();
if (m < 3) {
m += 12;
y -= 1;
}
int k = y % 100;
int j = y / 100;
int day = ((q + (((m + 1) * 26) / 10) + k + (k / 4) + (j / 4)) +
(5 * j)) % 7;
return day;
}
public string ToString(){
return "" + DAYS_OF_WEEK[day] + day;
}
}
