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作业作业

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Lesile

#1 Created at ... [Delete] [Delete and Lock User]
import java.util.Scanner;public class Main{    public static void main(String[] args){        Scanner scanner=new Scanner(System.in);        System.out.println("小明上次成绩:");        double a=scanner.nextDouble();        System.out.println("小明这次成绩:");        double b=scanner.nextDouble();        double c=100*(b-a)/a;        System.out.printf("小明成绩提高了:%.2f %%",c);        //表示百分号时 用%% %+%表示 百分号    }}

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