练习--java数组

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需求1：

求五个学生的分数的平均分

public class Demo02 {    public static void main(String[] args) {        // TODO Auto-generated method stub        int score[] = new int[5];        int sum = 0;        Scanner input = new Scanner(System.in);        int length = score.length;        for (int i = 0; i < length; i++) {            score[i] = input.nextInt();            sum += score[i];        }        double arg = (double) sum / length;        System.out.print("平均分为" + arg + "分");    }}

需求2:

这里写图片描述

import java.util.Scanner;public class Demo04 {    public static void main(String[] arge) {        int price[] = new int[101];        Scanner input = new Scanner(System.in);        int sum = 0;        for (int i = 0; i < 5; i++) {            System.out.println("请输入第" + (i + 1) + "笔金额:");            price[i] = input.nextInt();            sum += price[i];        }        System.out.println("序号" + "\t" + "金额");        for (int i = 0; i < 5; i++) {            System.out.println((i + 1) + "\t" + price[i]);        }    }}

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