Question

我正在针对Hacker Rank进行此操作，但出现错误。问题是：-查找数组元素的总和。

Solution.java:28：错误：缺少返回语句 } ^ 1个错误

import java.io.*;
import java.math.*;
import java.text.*;
import java.util.*;
import java.util.regex.*;

public class Solution {

    /*
     * Complete the simpleArraySum function below.
     */
    static int simpleArraySum(int[] ar) {
        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        int a[]=new int[n];


       int sum =0;
        for(int i=0;i<=n;i++){

            sum+=sc.nextInt();

        }

    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int arCount = Integer.parseInt(scanner.nextLine().trim());

        int[] ar = new int[arCount];

        String[] arItems = scanner.nextLine().split(" ");

        for (int arItr = 0; arItr < arCount; arItr++) {
            int arItem = Integer.parseInt(arItems[arItr].trim());
            ar[arItr] = arItem;
        }

        int result = simpleArraySum(ar);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedWriter.close();
    }
}

我仍然是一个初学者。很抱歉这不是一个愚蠢的问题，但这是我第一次进入黑客行列。我尝试在线搜索，但没有解决方案，所以我在这里问了

Answer 1

Stacktrace表示您缺少返回语句。返回总和值。此外，此方法还需要重构以在输入数组中添加数字。我确实是这样的：

static int simpleArraySum(int[] ar) {

        int sum = 0;
        for (int i = 0; i < ar.length; i++) {

            sum += ar[i];

        }
        return sum;
    }

Answer 2

添加返回语句

static int simpleArraySum(int[] ar) {
    int sum =0;
    int n = ar.length;
    for(int i=0;i<n;i++){
        sum+=ar[i];
    }
    return sum;
}

Solution.java:28：错误：缺少返回语句}

2 个答案: