Parameter of an array help

[Ryan Spark]

Struggling with this program that I'm working on for practice on my upcoming final. Not a CS person by any means kind of just took the course to get my feet wet but this one has me struggling the prompt is basically:

>"Design and implement an application that reads an integer value representing a year from the user. The purpose of the program is to determine if the year is a leap year in the Gregorian calendar. A year is a leap year if it is divisible by 4, unless it is also divisible by 100 but not 400. Produce an error message for any input value less than 1582 (the year the Gregorian calendar was adopted).

(I did this but then there's a question afterwards where you modify your answer) :

>"Modify the solution to the program above so that the user can evaluate multiple years. Allow the user to terminate the program using an appropriate sentinel value. Validate each input value to ensure it is greater or equal to 1582."

Here's what I have:

    System.out.println("How many years do you want to enter?");
        int num = input.nextInt();

        int array[] = new int[num];

        System.out.println("Enter the " + num + " years now.");
        
         for (int i = 0 ; i < array.length; i++ ) {
             array[i] = input.nextInt(); 
       }

       int n = array.length;

       for (int i = 0; i < n; i++){
        if (i%400==0)
         {
	System.out.println ("Your year is  a leap year");
         }
	else if(i %4==0 && i %100!=0)
        {
	  System.out.println ("Your year is a leap year" );
        }
	else
        {
	  System.out.println ("Your year is not a leap year" );
        }

       }
    }

The struggle I'm having is around the for loop where I want the program to check to see if the user's input falls within the range (>= 1582) but I'm struggling with how to get that in there and it's starting to bug me.

Would really appreciate some help, like I said I'm no expert so what I'm doing is probably very obvious to you and I'll feel dumb but I had nowhere else to turn.

[Aj Prieto]

Right now, you're using the loop variable and not the values contained in your array.

You need to access the values of the array.

for (int i = 0; i < array.length; i++){
  if (array[i] % 400 == 0){
     ...

It also looks like you're not checking if it is >= 1582.
Note: I haven't really looked over the logic, so I'm not sure if it's doing what its supposed to.

[Stuart A. Burkett]

Are you sure you need to store the values in an array ? The question doesn't say anything about keeping the values. You are also asking the user how many values are going to be entered. The question actually says you should use a sentinel value to allow the user to indicate when they are finished.
My reading of the question suggests you need something like (in pseudo code)

get value from user
while value is not sentinel value do
    if value less than 1582
        print error message
    else
        if value a leap year
            print 'Is a leap year'
        else
            print 'Not a leap year'
    get next value from user