[Java]Array作为参数传递，可以返回Array

Posted 2020-12-10 profesor

 

 

public class ArrayDemo
{
    public static void main(String[] args)
    {
        int[] a = {1, -9, 34, 67, 0, 12 ,34 ,5, 6, 11};
        System.out.println(Sum(a));
    }

    static int Sum(int[] arr)
    {
        int sum = 0;
        for (int i = 0; i < arr.length; ++i)
        {
            sum += arr[i];
        }
        //或者用下面for-each loop
        // for (int n : arr)
        // {
        //     sum += n;
        // }
        return sum;
    }
}