Question

所以我需要程序打印出每周平均温度的平均值，但我无法找到解决方法。目前我的列打印出一周的平均温度为deeplyNested = True thing = 'feedback' class Contrived(object): def __init__(self): if deeplyNested: logger.info( ("Sometimes there's a lot to say in %s and you need to write" " longer messages than what nicely fits in the 80 column" " limit."), thing )，因此它不在二维数组中，但现在我需要找到这些平均值的平均值。我尝试使用System.out.print来查找平均值，但打印出的数字不正确。我该怎么写这个代码？

System.out.print(average/4);

Answer 1

确定您的代码中的以下更改

声明平均average[] = new double[Temperature.length];
将此average = columnTotal / 7; System.out.println(average);替换为此

average[i] = columnTotal / 7 ; System.out.println(average[i]); 所以我正在做什么存储数组中的平均值。你将平均值存储在一个简单的变量中，这个变量一次又一次地被覆盖直到循环结束

最后用

替换代码的最后一部分

columnTotal = 0;

for (int i = 0; i < average.length; i++) {
        columnTotal = columnTotal +average[i];
    }
    System.out.print((columnTotal / 4) + "    ");

最后你的代码看起来像这样

import java.text.DecimalFormat;
import java.util.Scanner;

public class TwoDimArray {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        // 1) Declare and allocate Storage
        //Each day name is assigned to the array as a String so each name must be enclosed in apostrophes and each string must be separated by commas.
        String[] days = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
        double[][] Temperature = new double[4][7];

        // 2) Populate Array
        for (int i = 0; i < Temperature.length; i++) {
            for (int j = 0; j < Temperature[0].length; j++) {
                //days[j] will print the proper day and "(i+1)" will print the proper day of the week
                System.out.print("Enter " + days[j] + " Temperature " + "for Week " + (i + 1) + ": " + "    ");
                Temperature[i][j] = scan.nextDouble();
            }

        }
        System.out.println();
        System.out.println("              Weekly Temperature Report ");
        System.out.println("Mon     Tue     Wed     Thurs    Fri    Sat     Sun    Average");

        double columnTotal, average[] = new double[Temperature.length];
        // 4) Output Array

        for (int i = 0; i < Temperature.length; i++) {
            System.out.println();
            columnTotal = 0;
            for (int j = 0; j < Temperature[0].length; j++) {
                System.out.print(Temperature[i][j] + "\t");
                columnTotal += Temperature[i][j];
            }
            average[i] = columnTotal / 7;
            System.out.println(average[i]);
        }

        System.out.println();
        System.out.println("------------------------------------------------------------------");

        columnTotal = 0;
        for (int i = 0; i < average.length; i++) {
                columnTotal = columnTotal +average[i];
            }
            System.out.print((columnTotal / 4) + "    ");
            //System.out.print(average/4);

        }
    }

查找最后一列的平均值

1 个答案: