#include "mfhdf.h"
#define FILE_NAME "SDS.hdf"
main( )
{
/************************* Variable declaration **************************/
int32 sd_id, sds_id, sds_index;
intn status;
int32 start[2], edges[2];
int32 new_data[2];
int i, j;
/********************* End of variable declaration ***********************/
/*
* Open the file and initialize the SD interface with write access.
*/
sd_id = SDstart (FILE_NAME, DFACC_WRITE);
/*
* Select the first data set.
*/
sds_index = 0;
sds_id = SDselect (sd_id, sds_index);
/*
* Set up the start and edge parameters to write new element values
* into 10th row, 2nd column place, and 11th row, 2nd column place.
*/
start[0] = 9; /* starting at 10th row */
start[1] = 1; /* starting at 2nd column */
edges[0] = 2; /* rows 10th and 11th */
edges[1] = 1; /* column 2nd only */
/*
* Initialize buffer with the new values to be written.
*/
new_data[0] = new_data[1] = 1000;
/*
* Write the new values.
*/
status = SDwritedata (sds_id, start, NULL, edges, (VOIDP)new_data);
/*
* Terminate access to the data set.
*/
status = SDendaccess (sds_id);
/*
* Terminate access to the SD interface and close the file.
*/
status = SDend (sd_id);
}