#include<stdio.h>
#include "headfork.h"
#include "headbar.h"
#include "headshr.h"

main()
{
    int *x,*xsav,*imin,*imax,*bar;
    int shmid1,shmid2,shmid3,shmid4;
    int npts,np,id,n,i;

    x=shared(sizeof(int)*10,&shmid1);
    xsav=shared(sizeof(int)*2,&shmid2);
    imin=shared(sizeof(int)*2,&shmid3);
    imax=shared(sizeof(int)*2,&shmid4);

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

    printf("Enter the array elements :\n");
    for(i=1;i<=n;i++)
        scanf("%d",(x+i));

    printf("Enter the no.of proc :" );
    scanf("%d",&np);

    bar=bar_init(np);

    id=p_fork(np);

    npts=n/np;

    if(id!=0)
        imin[id]=id*npts;
    else
        imin[id]=1;

    if(id!=(np-1))
        imax[id]=(id+1)*npts-1;
    else
        imax[id]=n;

    xsav[id]=x[imax[id]+1];

    barrier(bar);

    for(i=imin[id];i<=imax[id]-1;i++)
        x[i]=x[i+1];

    x[imax[id]]=xsav[id];

    p_join(np,id);
    
    printf(“After Forward dependency : “);

    for(i=1;i<n;i++)
        printf("\n%d",x[i]);
}
    
OUTPUT

knoppix@ttyp0[pp]$ cc frwd_shd_une.c
knoppix@ttyp0[pp]$ ./a.out
Enter the size of array: 10
Enter the array elements :
1
2
3
4
5
6
7
8
9
10
Enter the no.of proc :4
After Forward dependency :
2
3
4
5
6
7
8
9
10