#include<stdio.h>
#include "shared.h"
#include "barrier.h"
#include "forkjoin.h"int main()
{
        int size, i, nproc, pid, *bar, *x, *y, sx=0, sy=0;
        int sh1, sh2, sh3, sh4, sh5, sh6, sh7, sh8;
        float *meanx, *meany, *X, *Y, *XY;

        printf("Enter the total number of processes :: ");
        scanf("%d",&nproc);

        printf("Enter the size of the array :: ");
        scanf("%d",&size);

        x=(int *)create_memory(size*2,&sh1);
        y=(int *)create_memory(size*2,&sh2);                

        meanx=(float *)create_memory(4,&sh3);
        meany=(float *)create_memory(4,&sh4);
        *meanx = *meany = 0;

        bar=(int *)create_memory(4*2,&sh5);
        barrier_init(bar,nproc);

        XY=(float *)create_memory(4,&sh6);
        *XY=0;

        X=(float *)create_memory(4,&sh7);
        Y=(float *)create_memory(4,&sh8);

        printf("Enter the elements for first array\n",i+1);
        for(i=0;i<size;i++)
                scanf("%d",&x[i]);

        printf("Enter the elements for second array\n");
        for(i=0;i<size;i++)
                scanf("%d",&y[i]);

        pid=create_process(&nproc);
        for(i=pid;i<size;i+=nproc)                   
        {
                sx += x[i];
                sy += y[i];
        }
        *meanx += (float)sx/size;
        *meany += (float)sy/size;

        barrier(bar);

        for(i=pid;i<size;i+=nproc)
        {
                X[i] = (float)(x[i] - *meanx);
                Y[i] = (float)(y[i] - *meany);
        }

        barrier(bar);

        for(i=pid;i<size;i+=nproc)
                *XY += X[i]*Y[i];

        join_process(&nproc,&pid);

        if(*XY > 0)                           
                printf("The corelation between two data sets is positive.");
        elseif(*XY < 0)
                printf("The corelation between two data sets is negative.");

        cleanup_memory(&sh1);
        cleanup_memory(&sh2);
        cleanup_memory(&sh3);
        cleanup_memory(&sh4);
        cleanup_memory(&sh5);
        cleanup_memory(&sh6);
        cleanup_memory(&sh7);
        cleanup_memory(&sh8);

        return 0;
}                              

/* OUTPUT */


Enter the total number of processes :: 3
Enter the size of the array :: 5
Enter the elements for first array
12
14
2
1
3
Enter the elements for second array
1
2
3
4
5
The corelation between two data sets is negative.