import java.util.Scanner;public class Main {    public static void main(String[] args) {        int score1;        int score2;        Scanner scanner = new Scanner(System.in);        System.out.println("输入上次考试成绩：");        score1 = scanner.nextInt();        System.out.println("输入这次考试成绩：");        score2 = scanner.nextInt();        float up = (float)(score2 - score1) / score1 * 100;        System.out.printf("成绩提高了" + "%.2f%%" + "!",up );    }}