Question

编译代码时，我一直无法获取double不能被取消引用的错误。这是我编写的通过2D数组解析的代码

    /*
     * calcCarbonFootprints
     *
     * Purpose: calculates carbon foot print of each person in a population
     *   and store the result in the corresponding index of the 1D result array
     *
     * Parameters:  double[] - a 2D array of data for a populution where,
     *                each row represents an individual in the population and
     *                each column of a row has the following data for that individual:
     *                  -fuel efficiency of their car
     *                  -average kms driven per day
     *                  -the age of their car
     *                  -average kms on transit per day
     *              int[] - a 1D array to store the total carbon footprint for each individual
     *
     * Preconditions: none
     *
     * Returns: void
     *  
     */
    // TODO
        public static void calcCarbonFootprints ( double[] data, int[] carbon_footprint_results) {
        for (int i=0; i < data.length; i++) {

                for (int j=0; j<(int)data[i].length;j++) {

                }
            }
        }

是因为我需要在第二个for循环中使用它之前将data[i]转换为整数吗？

Answer 1

正如@Gendarme所说，double没有length字段。在第二个循环中，您有data[i].length应该抛出该错误。当您在数组中请求第i个double，然后询问编译器不喜欢的double的{{1}}时。

您可以尝试取消length现场通话。

Answer 2

如果您尝试解析2D双精度数组，则函数isgnature应该为：

public static void calcCarbonFootprints(double[][] data, int[] carbon_footprint_results)

无法取消引用Double，解析2D数组

2 个答案: