Java:如何为一个int读取多个扫描仪值 [英] Java: How to read multiple scanner values for one int

问题描述

我一直试图弄清楚如何根据从Scanner类获得的输入来计算面积和体积.练习包括一次接收多对半径和高度.

I have been trying to figure out how calculate the area and volume based on the input obtain from the Scanner Class. The exercise consist of receiving multiple pair of radius and height at once.

我已经编写了方法并对其进行了测试，因此这些方法应该可以工作.我遇到的问题是，当我想使用扫描仪"中的输入并使用它们进行计算时.

I have written the methods and tested them, so those should be working. The problem I am having is when I want to use inputs from 'Scanner' and use them to make the calculations.

这是我的代码(我不包括方法):

Here is my code (I did not include the methods):

    Scanner keyboard = new Scanner(System.in); 

    int radius = 0;
    int height = 0;

    System.out.print("Enter values ");
    String input = keyboard.nextLine();

    String[] items = input.split(" ");
    int[] numbers = new int[items.length];

    for (int i = 0; i < items.length; i++)  
        {
            numbers[i] = Integer.parseInt(items[i]);
        } 

    for (int i = 0; i < numbers.length/2; i++)
    {
        numbers[i] = radius;
        numbers[i + 1] = height;

        double result = area(radius);
        double result1 = area (radius,height);
        double result2 = volume (radius,height);

        System.out.println("");
        System.out.print("r = " + radius + "    ");
        System.out.print("h = " + height);
        System.out.println("");
        System.out.print("Base area:    ");
        System.out.printf("%.2f", result);
        System.out.println("");
        System.out.print("Surface area: ");
        System.out.printf("%.2f", result1);
        System.out.println("");
        System.out.print("Volym:            ");
        System.out.printf("%.2f", result2);
        System.out.println("");
    }
    keyboard.nextLine(); 

这些是结果:

Input: 2 4 5 1

Output: 


r = 0    h = 0

Base area:        0.00

Surface area:     0.00

Volym:            0.00



r = 0    h = 0

Base area:        0.00

Surface area:     0.00

Volym:            0.00

推荐答案

您必须执行以下操作:

for (int i = 0; i < numbers.length; i+=2)
{
    radius = numbers[i];
    height = numbers[i + 1];
    .
    .
    .
}   

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