java - 数组输入未相加。 -- 总计 += ScoreArray[i];

Question

由于某种原因，下面的这部分代码没有将每个数组项添加到一起。我单步执行调试器，正在创建并递增数组项，但 total += ScoreArray[i]; 似乎没有将已输入的数字相加。相反，我只是将第一个输入除以数组长度作为最终输出

    public double getAverage()
    {
        double total = 0.0;
        for (int i = 0; i < scoreArray.length; i++)
            total += scoreArray[i];

        return (total / scoreArray.length);
    }

完整代码

package driver;
import java.util.Scanner;

public class TestScores
{
    private double[] scoreArray;

    public TestScores(double[] test) throws IllegalArgumentException
    {
        scoreArray = new double[test.length];
        for (int i = 0; i < test.length; i++)
        {
            if (test[i] < 0 || test[i] > 100)
                throw new IllegalArgumentException("Test scores must have a value less than 100 and greater than 0.");
            else
                scoreArray[i] = test[i];
        }
    }

    public double getAverage()
    {
        double total = 0.0;
        for (int i = 0; i < scoreArray.length; i++)
            total += scoreArray[i];

        return (total / scoreArray.length);
    }

    public static void main(String[] args)
    {  
        int score = 0;
        int scores = 0;

        Scanner userInput = new Scanner(System.in);

        System.out.print("Enter number of test scores: ");
        score = userInput.nextInt();

        double[] scoreArray = new double[score];

        for (int i = 0; i <= score - 1; i++)
        {    
            System.out.print("Enter test score " + (i + 1)+ ": ");
            scoreArray[scores] = userInput.nextDouble();      
        }  

        TestScores testScore  = new TestScores(scoreArray);
        System.out.println(testScore.getAverage());
    }
}

Answer 1

请更改接受用户评分的循环，如下所示:

for (int i = 0; i <= score - 1; i++)
{    
    System.out.print("Enter test score " + (i + 1)+ ": ");
    // scoreArray[scores] = userInput.nextDouble();  <-- value of scores is zero
    scoreArray[i] = userInput.nextDouble();      
}

在填充 ScoreArray 时，您应该使用“i”而不是“scores”。目前，您仅使用最后输入的用户输入来填充“scoreArray”。