// Funktionsdeklarationer

#ifndef wave_h
#define wave_h

#include <math.h>
#include <mpi.h>
#include "time.h"
#include "Array2_dbl.h"
const double pi=3.14159265358979;
double h(double z);
double F(double x, double y);
double up(double x, double y);
void diffop(Array2_dbl &du,Array2_dbl &u,int NNx,int NNy,
	    int nreq, MPI_Request *reqarr, int *coords,int *dims);
void bound(Array2_dbl &unew, Array2_dbl &uold, double t, double dt,
	   double dx, double dy, int nx1, int ny1, MPI_Comm proc_grid);
double residual(Array2_dbl &u,double t,double dx, double dy, int nx1,
		int ny1, MPI_Comm proc_grid);
void init_comm(Array2_dbl &u, MPI_Comm proc_grid, 
	       int &nreq, MPI_Request *reqarr);
int Dims_create(int nnodes, int ndims, int *dims);
int timer(void);
int use_cabinet(int);

#endif