floorspace do-while程序

Question

我应该写一个程序来计算一所房子的总建筑面积。该程序提示用户输入至少一个房间的长度和宽度，如果用户想要输入更多的房间尺寸，则需要与用户进行验证。

它不起作用。谁来帮帮我？

import java.util.*;

public class FloorSpace
{

    public static void main (String[] args)
    {

        Scanner input = new Scanner(System.in); 

        double length = 0.0, width = 0.0, floorSpace = 0.0;
        char ans;


        do
        {
            System.out.print("Enter length: ");
            length = input.nextDouble();

            System.out.print("Enter width: ");
            width = input.nextDouble();

            floorSpace = length * width;

            floorSpace += floorSpace;

            System.out.print("Do you want to enter more room dimensions? (y/n): ");
            ans = input.nextLine().charAt(0);
        }
        while (ans == 'y');


        System.out.println("\nTotal floor space is " + floorSpace);

    }

}

哦，天哪，我刚发现我的计算公式有问题。谁能帮帮我。

Answer 1

您每次都会将floorSpace设置为length * width，然后自行递增该值(实际上就是将其乘以2)。

替换

floorSpace = length * width;

floorSpace += floorSpace;

使用just

floorSpace += length * width

Answer 2

而不是：

ans= input.nextLine().charAt(0);

使用：

ans = input.next().charAt(0);

要修复您的公式，请使用：

    floorSpace += length * width;

并删除：

floorSpace = length * width;

因此，最终的解决方案如下所示：

import java.util.*;

public class FloorSpace
{

    public static void main (String[] args)
    {

        Scanner input = new Scanner(System.in); 

        double length = 0.0, width = 0.0, floorSpace = 0.0;
        char ans;


        do
        {
            System.out.print("Enter length: ");
            length = input.nextDouble();

            System.out.print("Enter width: ");
            width = input.nextDouble();

            floorSpace += length * width;

            System.out.print("Do you want to enter more room dimensions? (y/n): ");
            ans = input.next().charAt(0);
        }
        while (ans == 'y');

        System.out.println("\nTotal floor space is " + floorSpace);
    }
}

Answer 3

试试这个：

import java.util.*;

public class FloorSpace
{

    public static void main (String[] args)
    {

        Scanner input = new Scanner(System.in); 

        double length = 0.0, width = 0.0, floorSpace = 0.0;
        char ans='n'; //not for default


        do
        {
            System.out.print("Enter length: ");
            length = input.nextDouble();

            System.out.print("Enter width: ");
            width = input.nextDouble();



            floorSpace +=  length * width;

            System.out.print("Do you want to enter more room dimensions? (y/n): ");
            if (input.hasNext()){
                ans = input.next().charAt(0);
            }
        }
        while (ans == 'y');


        System.out.println("\nTotal floor space is " + floorSpace);

    }
}

问候