java - 我的java数组代码有什么问题？

Question

   import java.util.Scanner;


public class SumArray {

public static void main(String[] args) {


    int average = 0;
    int sum = 0;

    Scanner keyboard = new Scanner(System.in);

    System.out.println("Enter as many numbers as you wish. Enter -99 to finish your input.");



    do {        
        int i = 0;
        int numArray[];
        numArray [i] = keyboard.nextInt();
        sum = sum + numArray[i];
        i++;
    **} while (numArray[i] != -99);**

    **average = sum/numArray.length;**

    System.out.println("The sum of the numbers is " + sum + ".");
    System.out.println("The average of the numbers is " + average + ".");

}

}

我在带星号的两行中收到错误。它说 numArray 不能解析为变量，i 也是如此。我使用 Eclipse 作为我的 IDE。

Answer 1

do {        
    int i = 0;
    int numArray[];
    numArray [i] = keyboard.nextInt();
    sum = sum + numArray[i];
    i++;
} while (numArray[i] != -99);

numArray 是在 do while 循环的范围内定义的。所以你不能从范围之外访问它(即在这里你不能访问它，因为你试图在右大括号之后访问它)。

要解决这个问题，请在周围范围内定义 numArray。

这同样适用于i。