Question

public class Lab1 {

public static void main(String[] args) {

int array [] = {10, 20, 31, 40, 55, 60, 65525};

System.out.println(findPattern(array));

}

private static int findPattern(int[] arr) {

for (int i = 0; i < arr.length - 2; i++) {

int sum = 0;

for (int j = i; j < i + 2; j++) {

sum += Math.abs(arr[j] - arr[j + 1]); // finding the difference

}

if (sum == 20)

return i;

}

return -1;

}

}

QUESTION: Modify the code segment to generalize the gap spacing. Instead of hard- coding the difference of 20 into the function, change the function signature to include it as a parameter.

Answer 1

public class Lab1 {
    public static void main(String[] args) {
        int array[] = {10, 20, 31, 40, 55, 60, 65525};
        System.out.println(findPattern(array, 20));
    }

    private static int findPattern(int[] arr, int gap) {
        for (int i = 0; i < arr.length - 2; i++) {
            int sum = 0;
            for (int j = i; j < i + 2; j++) {
                sum += Math.abs(arr[j] - arr[j + 1]); // finding the difference
            }
            if (sum == gap)
                return i;
        }
        return -1;
    }
}