将矩阵中数据0所在的行和列的值都设置为零

Question

private void r(double[][] test)
        {
            if (test != null)
            {
                for (int i = 0; i < test.Length; i++)
                {
                    for (int j = 0; j < test[i].Length; j++)
                    {
                        if (test[i][j] == 0)
                        {
                            next("向上", test, i, j, i, j);
                        }
                    }
                }                for (int i = 0; i < test.Length; i++)
                {
                    for (int j = 0; j < test[i].Length; j++)
                    {
                        if (test[i][j].Equals(double.NaN))
                        {
                            test[i][j] = 0;
                        }
                    }
                }
            }
        }        private void next(string dire, double[][] test, int i, int j, int baseI, int baseJ)
        {
            if ((i != baseI || j != baseJ) && test[i][j] != 0)
            {
                test[i][j] = double.NaN;
            }            if ("向上".Equals(dire))
            {
                if (i - 1 < 0)
                {
                    next("向右", test, baseI, baseJ, baseI, baseJ);
                }
                else
                {
                    next("向上", test, i - 1, j, baseI, baseJ);
                }
            }
            else if ("向右".Equals(dire))
            {
                if (j + 1 == test[0].Length)
                {
                    next("向下", test, baseI, baseJ, baseI, baseJ);
                }
                else
                {
                    next("向右", test, i, j + 1, baseI, baseJ);
                }
            }
            else if ("向下".Equals(dire))
            {
                if (i + 1 == test.Length)
                {
                    next("向左", test, baseI, baseJ, baseI, baseJ);
                }
                else
                {
                    next("向下", test, i + 1, j, baseI, baseJ);
                }
            }
            else if ("向左".Equals(dire))
            {
                if (j - 1 < 0)
                {
                    return;
                }
                else
                {
                    next("向左", test, i, j - 1, baseI, baseJ);
                }
            }        }