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 covariance, and tidy output, finally to release allocated memory!