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作业 完成

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提高的 百分比 是 除以 之前本身 应该 就是对的

Scanner scanner = new Scanner(System.in);double percent;double prev = scanner.nextDouble();double score = scanner.nextDouble();percent = (score - prev) / prev * 100;System.out.printf("成绩提高了%.2f%%", percent);

package com.itranswarp.learnjava;

import java.util.Scanner;

/**

 * 输入上次考试成绩(int)和本次考试成绩(int),然后输出成绩提高的百分比,保留两位小数位(例如,21.75%)

 */

public class Main {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("输入上次考试成绩:");

int prev = sc.nextInt();

System.out.println("本次考试成绩:");

int score = sc.nextInt();

double percent = (float)(score-prev)/prev*100;

System.out.printf("成绩提高了%.2f%%",percent);

sc.close();

}

}


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