Approximating PI number

/********************************************************/
/*  XPRD library example                                */
/*  ====================                                */
/*                                                      */
/*  file piap.c                                         */
/*  ```````````                                         */
/* Example of use of XPRD: C version of piapprox.mos    */
/*       Calculations are performed by the Mosel models */
/*                                                      */
/*  (c) 2011 Fair Isaac Corporation                     */
/*      author: S. Heipcke, 2011                        */
/********************************************************/

#include 
#include "xprd.h"

#define N 1000000
#define K 20
#define NEWSUM 2

const char *nodelist[]={"","localhost"};
#define M (sizeof(nodelist)/sizeof(nodelist[0]))

int main()
{
 char msg[256];
 XPRDcontext xprd;
 XPRDmosel moselInst[M];
 XPRDmodel modPar[K],sender;
 int modct,nbfinished,i,j;
 int cls;
 double val;
 double mypi;

 xprd=XPRDinit();
 for(i=0;i

/********************************************************/
/*  XPRD library example                                */
/*  ====================                                */
/*                                                      */
/*  file piap.java                                      */
/*  ``````````````                                      */
/* Example of use of XPRD: Java version of piapprox.mos */
/*       Calculations are performed by the Mosel models */
/*                                                      */
/*  (c) 2011 Fair Isaac Corporation                     */
/*      author: S. Heipcke, 2011                        */
/********************************************************/

import com.dashoptimization.*;
import java.lang.*;
import java.io.*;

public class piap
{
 static final int N=1000000;
 static final int K=20;
 static final int NEWSUM=2;
 static final String nodelist[]={"","localhost"};

 public static void main(String[] args) throws Exception
 {
  int M=nodelist.length;
  XPRD xprd=new XPRD();
  XPRDMosel moselInst[]=new XPRDMosel[M];
  XPRDModel modPar[]=new XPRDModel[K];
  XPRDEvent ev;
  int modct,nbfinished;
  double mypi;

  for(int i=0;i

(!*******************************************************
   Mosel Example Problems
   ======================

   file piapprox.mos
   `````````````````
   Approximating the value of pi by integrating the
   function 1/(1+x^2) over the interval [0,1].
   The integral is approximated by dividing the interval [0,1]
   into N subintervals and calculating the sum of their areas.   
   
   integral 0 to 1  1/(1+x^2)dx
   = arctan(1)-arctan(0)
   = arctan(1)
   = pi/4   
   
   (c) 2010 Fair Isaac Corporation
       author: S. Heipcke, June 2010
  *******************************************************!)

model "approximating pi"
 uses "mmjobs"
 
 parameters
  N = 1000000                  ! Number of intervals
  K = 20                       ! Number of submodels to run
 end-parameters
 
 if N<1 then exit(1); end-if

!!! Configure this list with machines in your local network, 
!!! there must be at least 1 entry in this list.
  NODELIST:=["","localhost"]
 
 declarations
  A = 1..K
  B: range
  modPar: array(A) of Model
  moselInst: array(B) of Mosel
  NODES: array(B) of string

  h,res: real
  id, M: integer
  
  NEWSUM = 2
  ev: Event
 end-declarations 
 
 id:=getparam("NODENUMBER")

! Start child nodes
 if id=0 then
  forall(n in NODELIST, ct as counter) NODES(ct):=n
  M:= getsize(B)

  forall(i in B) do
   create(moselInst(i))            
   if connect(moselInst(i), NODES(i))<>0 then exit(2); end-if
  end-do
  
  if compile("piapprox.mos")<>0 then exit(3); end-if
  forall(j in A) do
    load(moselInst(j mod M + 1), modPar(j), "rmt:piapprox.bim")  
                                   ! Start remote model execution
    run(modPar(j), "N="+N)
  end-do
 
 else

! Calculate a part of pi
 h:=1/N
 i:= id+1
 while(i <= N) do
   x:=h*(i-0.5)
   pisum+= 4/(1+x^2)
   i+=K
 end-do 
 mypi:=h*pisum

 writeln(id, "(", getparam("JOBID"), "): ", strfmt(mypi,20,19))
 end-if
 
 if id>0 then
 ! Return the solution value
   send(NEWSUM, mypi)
 else 
 ! Add up values for parts returned by child models
   modct:=0
   while (modct