...
#include <netcdf.h>
...
/* Handle errors by printing an error message and exiting */
#define ERR(e) {printf("Error: %s\n", nc_strerror(e)); exit(ERRCODE);}
...
/* netCDF file ID and variable ID */
int ncid, varid;
/* array into which we will read values of 2D netCDF variable */
float rh_array[NLAT][NLON]
...
/* Open the file with read-only access, indicated by NC_NOWRITE flag */
if ((retval = nc_open("foo.nc", NC_NOWRITE, &ncid)))
ERR(retval);
/* Get the id of the variable named "rh" */
if ((retval = nc_inq_varid(ncid, "rh", &varid)))
ERR(retval);
/* Read entire variable "rh" as floats, rh_array must be big enough! */
if ((retval = nc_get_var_float(ncid, varid, &rh_array[0][0])))
ERR(retval);
/* Close the file, freeing all resources. */
if ((retval = nc_close(ncid)))
ERR(retval);
...