采用指向指针的指针来动态分配二维数组，存储读取的文本结构内的数据。求得这二维数组内的行均值与协方差，并整齐输出，最后对所分配的内存进行释放！-Using a pointer to the pointer to dynamically allocated two dimensional array, storage read text structure within the data. Obtained in the two dimensional array of mean and covar