遍历二维数组 c# [英] Iterate through 2 dimensional array c#

问题描述

for(int k=0;k <= odds.GetLength(-1);k++)

上面的代码行应该遍历一个 Double 类型的二维数组，但不断抛出以下异常.索引超出范围异常.有人愿意解释原因并提供解决方案吗?非常感谢.

The above line of code is supposed to iterate through a two dimensional array of type Double but keeps throwing the following exception. Index Out Of Range Exception. Would someone be kind enough to explain why and provide a solution. Many thanks.

推荐答案

您正在将无效索引传递给 GetLength.多维数组的维数是基于 0 的，所以 -1 无效，使用负数(或大于维数 - 1 的数字)会导致 IndexOutOfRangeException.

You are passing an invalid index to GetLength. The dimensions of a multidimensional array are 0 based, so -1 is invalid and using a negative number (or a number that is larger than the number of dimensions - 1) would cause an IndexOutOfRangeException.

这将遍历第一维度:

for (int k = 0; k < odds.GetLength(0); k++)

您需要添加另一个循环来遍历第二个维度:

You need to add another loop to go through the second dimension:

for (int k = 0; k < odds.GetLength(0); k++)
    for (int l = 0; l < odds.GetLength(1); l++)
        var val = odds[k, l];

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