import java.util.Scanner;public class Test{    public static void main(String args[]) {        Scanner scanner = new Scanner(System.in);        System.out.print("上次考试成绩: ");        int last = scanner.nextInt();        System.out.print("本次考试成绩: ");        int now = scanner.nextInt();        double percent =  (double) (now > last ? (now - last) : (last - now)) / last * 100;        System.out.printf("本次考试" + ((now > last) ? "提升" : "降低") + "%.2f%%", percent);     }}