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import java.util.Scanner;

public class Grade
{
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		System.out.print("输入上一次的考试成绩:");
		int lastGrade = scanner.nextInt();
		System.out.print("输入此次考试成绩:");
		int grade = scanner.nextInt();
		float up = ((float)grade/(float)lastGrade)*100;
		if (up < 100.00)
		{
			System.out.printf("此次考试成绩较上一次下降了 %.2f %%~~",up);
		} else if (up == 100.00) {
			System.out.printf("两次成绩一样。");	
		} else {
			System.out.printf("此次考试成绩较上一次提升了 %.2f %%~~",up);
		}
	}
}

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