#include "mfhdf.h"

#define FILE_NAME     "SDS.hdf"

int main()
{
   /************************* Variable declaration **************************/

   int32 sd_id, sds_id;
   intn  status;
   int32 n_datasets, n_file_attrs, index;
   int32 dim_sizes[H4_MAX_VAR_DIMS];
   int32 rank, data_type, n_attrs;
   char  name[H4_MAX_NC_NAME];
   int   i;

   /********************* End of variable declaration ***********************/

   /*
   * Open the file and initialize the SD interface.
   */
   sd_id = SDstart (FILE_NAME, DFACC_READ);

   /*
   * Determine the number of data sets in the file and the number
   * of file attributes. 
   */
   status = SDfileinfo (sd_id, &n_datasets, &n_file_attrs);

   /*  
   * Access every data set and print its name, rank, dimension sizes,
   * data type, and number of attributes. 
   * The following information should be displayed:
   *
   *               name = SDStemplate
   *               rank = 2
   *               dimension sizes are : 16  5  
   *               data type is  24
   *               number of attributes is  0
   */
   for (index = 0; index < n_datasets; index++)
   {
       sds_id = SDselect (sd_id, index);
       status = SDgetinfo (sds_id, name, &rank, dim_sizes, 
                           &data_type, &n_attrs);

       printf ("name = %s\n", name);
       printf ("rank = %d\n", rank);
       printf ("dimension sizes are : ");
       for (i=0; i< rank; i++) printf ("%d  ", dim_sizes[i]);
       printf ("\n");
       printf ("data type is  %d\n", data_type);
       printf ("number of attributes is  %d\n", n_attrs);

       /*
       * Terminate access to the data set.
       */
       status = SDendaccess (sds_id);
   }

   /*
   * Terminate access to the SD interface and close the file.
   */
   status = SDend (sd_id);

   return 0;
}