java - 不兼容的类型 - double 到 int？

Question

Java 似乎认为我正在尝试对我的双变量之一进行转换或执行某种操作。我收到错误消息

average2.java:23: error: incompatible types: possible lossy conversion from double to int scores[count++]=score;

我真的很困惑，因为到目前为止我还没有将任何东西声明为整数， - 每个变量都是 double 的，因为我希望有一些小数。下面是我的代码:

public static void main (String [] args)
{

    double numOf;
    double lowest = 100;
    double count = 0;
    double sum = 0;

    double average = 0;
    double score;

    double scores[] = new double[100]; //[IO.readDouble("Enter Scores, Enter -1 to Quit")];

    while ((count <100) &&(( score =IO.readDouble("Enter Scores,  (-1 to Quit")) > 0));
    {
        scores[count++]=score;
    }

    //This section obtains the highest number that was entered`
    double max = scores[0];
    for (double i=0; i<scores.length; i++)
        if(max < scores[i])max =scores[i];

    System.out.println("Maximum is " + max);    

    // This section obtains the lowest score entered    
    double min = scores[0];
    for (int i=0; i<scores.length; i++)
        if (min > scores[i]) min = scores [i];

    int sumOf =0;
    for (int i=0; i < scores.length; i++)
    {    
        sumOf += scores[i];     
    }
    System.out.println("The sum of all scores is  " + sumOf);

    System.out.println("Minimum is " + min);

    count = count + 1;                     

    average =  (sumOf/scores.length);     
    System.out.println("Average is " + average);
} //end main      
} //end class     

Answer 1

错误涉及 count 变量，它是一个 double。但是 int 是数组的有效索引。该错误是由于使用 double 作为索引而导致的，而索引应为 int。

将 count 声明为 int。

出于同样的原因，您还应该在第一个 for 循环中将 i 声明为 int。