Java实现

public class ShellSort {
    public static void sort(int[] arr) {
        int n = arr.length;
        int gap = n / 2;

        while (gap > 0) {
            for (int i = gap; i < n; i++) {
                int temp = arr[i];
                int j;
                for (j = i; j >= gap && arr[j - gap] > temp; j -= gap) {
                    arr[j] = arr[j - gap];
                }
                arr[j] = temp;
            }
            gap /= 2;
        }
    }

    public static void main(String[] args) {
        int[] arr = {3, 5, 1, 9, 2, 8, 7, 6, 4};
        sort(arr);
        for (int i : arr) {
            System.out.print(i + " ");
        }
    }
}