/* This is part of the netCDF package.
   Copyright 2006 University Corporation for Atmospheric Research/Unidata.
   See COPYRIGHT file for conditions of use.

   This is a very simple example which writes a 2D array of
   sample data. To handle this in netCDF we create two shared
   dimensions, "x" and "y", and a netCDF variable, called "data".

   This example is part of the netCDF tutorial:
   http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-tutorial

   Full documentation of the netCDF C++ API can be found at:
   http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-cxx

   $Id: simple_xy_wr.cpp,v 1.3 2007/06/19 20:30:46 forbes Exp $
*/

#include <iostream>
#include <netcdfcpp4.h>
#include <string>
#include <cstring>


using namespace std;
using namespace netCDF;


// We are writing 2D data, a 6 x 12 grid. 
static const int NX = 6;
static const int NY = 12;

// Return this in event of a problem.
static const int NC_ERR = 2;



int main(void)
{
    // This is the data array we will write. It will just be filled
  // with a progression of numbers for this example.
  int dataOut[NX][NY];
 
  // Create some pretend data. If this wasn't an example program, we
  // would have some real data to write, for example, model output.
  for(int i = 0; i < NX; i++)
    for(int j = 0; j < NY; j++)
      dataOut[i][j] = i * NY + j;
 
  // The default behavior of the C++ API is to throw an exception i
  // an error occurs. A try catch block in necessary.
   
  try
    {  
      // Create the file. The Replace parameter tells netCDF to overwrite
      // this file, if it already exists.
      string filename ="simple_xy.nc"; 
      NcFile dataFile(filename, NcFile::Replace);
      
      
      // When we create netCDF dimensions, we get back a pointer to an
      // NcDim for each one.
      NcDim* xDim = dataFile.addDim("x", NX);
      NcDim* yDim = dataFile.addDim("y", NY);
      
      // Define the variable. The type of the variable in this case is
      // ncInt (32-bit integer).
   NcVar *data = dataFile.addVar("data", ncInt, xDim, yDim);
   
   // Write the pretend data to the file. Although netCDF supports
   // reading and writing subsets of data, in this case we write all
   // the data in one operation.
   data->put(&dataOut[0][0], NX, NY,0,0,0);
   
   // The file will be automatically close when the NcFile object goes
   // out of scope. This frees up any internal netCDF resources
   // associated with the file, and flushes any buffers.
   
   cout << "*** SUCCESS writing example file simple_xy.nc!" << endl;
    }
  catch(std::exception e)
    {e.what();}
  return 0; 
}