[netCDF #FQF-733069]: what is wrong with this small program?

Hi Angela,

> Is something wrong with my start/count? I get -101 returned from
> nc_put_vara.

Nothing is wrong with your start/count, but address for the start of the 
data array that you provided is wrong.  Instead of 

  (const void *)&data[0]

which would be OK for a one-dimensional data array, use

  &data[0][0]

because you have declared data to be a 2-dimensional array.  It also works if
you just use 

  data

as the argument, because in C for a 2D array, that's the same as &data[0][0].

Your statement

> ret = nc_put_vara(gid,varid,(const size_t *)start,(const size_t
> *)count,(const void *)&data[0]);

could be simplified to

  ret = nc_put_vara(gid,varid, start, count, data);

if you declared start and count to be of type size_t instead of int:

  size_t start[2]={0,0};
  size_t count[2]={1,3};

--Russ

> Thanks,
> Angela Sigmund
> 
> *******************************************************
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> 
> #include <netcdf.h>
> 
> int main(void){
> 
> int ret,ncid,gid;
> int dimids[2];
> int data[2][3]={1,2,3,4,5,6};
> int varid;
> int start[2]={0,0};
> int count[2]={1,3};
> 
> ret = nc_create("/home/asigmund/data/test.nc", NC_NETCDF4, &ncid);
> ret=nc_def_grp(ncid, "group1",&gid);
> ret=nc_def_dim(ncid,"x",2,&dimids[0]);
> ret=nc_def_dim(ncid,"y",3,&dimids[1]);
> ret=nc_def_var(gid,"data",NC_INT,2,dimids,&varid);
> ret = nc_enddef(ncid);
> 
> ret = nc_put_vara(gid,varid,(const size_t *)start,(const size_t
> *)count,(const void *)&data[0]);
> if (ret!=0) printf("%d\n",ret);
> 
> ret= nc_close(ncid);
> 
> }
> 
> 
> 
> --
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> 
> 

Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: FQF-733069
Department: Support netCDF
Priority: Normal
Status: Closed