#include <stdio.h>
#include <string.h>
#include "headfork.h"
#include "headsem.h"
#include "headshr.h"

main()
{
    int i,nprc,id,shmid1,shmid2,shmid3,*final,flg=0;
    char *s1,*s2;

    s1=(char *)shared(sizeof(char)*10,&shmid1);
    s2=(char *)shared(sizeof(char)*10,&shmid2);
    final=(int *)shared(sizeof(int)*5,&shmid3);


    for(i=0;i<10;i++)
    {
        *(s1+i)='\0';
        *(s2+i)='\0';
    }    
    
    printf("Enter first string : ");
    scanf("%s",s1);

    printf("\nEnter second string : ");
    scanf("%s",s2);

    printf("\nEnter the no.of proc: ");
    scanf("%d",&nprc);

    id=p_fork(nprc);
    *(final+id)=1;

    for(i=id;*(s1+i)!='\0' || *(s2+i)!='\0';i+=nprc)
    {
        //if(strcomp(*(s1+i),*(s2+i))==0)if(*(s1+i)=*(s2+i))
            *(final+id)=0;
        else
        {
            *(final+id)=1;
            break;
        }
    }

    p_join(nprc,id);

    for(i=0;i<nprc;i++)
    {
        if(*(final+i)==0)
            flg=0;
        elseif(*(final+i)==1)
        {
            flg=1;
            break;
        }
    }
    if(flg==0)
        printf("\n Strings are equal");
    elseif(flg==1)
        printf("\n Strings are not equal");
}

OUTPUT

knoppix@ttyp0[pp]$ cc comp_str_lps.c
knoppix@ttyp0[pp]$ ./a.out
Enter first string : college

Enter second string : college

Enter the no.of proc: 3

Strings are equal

knoppix@ttyp0[pp]$ cc comp_str_lps.c
knoppix@ttyp0[pp]$ ./a.out
Enter first string : college

Enter second string : vasad

Enter the no.of proc: 3

Strings are not equal