To send palindrome back to parent process

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
int main(){
  int pid,a,n,p[2],p2[2],i,len,j,k,flag,n2=0;
  char buffr1[100][100],buffr2[100][100],buf[5];
  printf("Enter the limit:- ");
  scanf("%d",&n);
  a = pipe(p);
  if(a == -1)
  {
     fprintf(stderr, "Pipe Failed.\n");
     return EXIT_FAILURE;
  }
  a = pipe(p2);
  if(a == -1)
  {
     fprintf(stderr, "Pipe Failed.\n");
     return EXIT_FAILURE;
  }
   pid = fork();
   switch(pid)
   {
     case -1:perror("main: fork");
exit(1);
     case 0: read(p[0],buffr2,sizeof(buffr2));
      printf("In child process (ID: %d)\n", pid);
      for(i=0;i<n;i++)
{
        len=strlen(buffr2[i]);
        flag=0;
        for(j=0,k=len-1;j<len;j++,k--)
{
if(buffr2[i][j]!=buffr2[i][k])
{
flag=1;
break;
}
        }
        if(flag==0)
{
n2++;
strcpy(buffr1[n2],buffr2[i]);
        }
      }
      buffr1[0][0]=n2;
      write(p2[1],buffr1,sizeof(buffr1));
      exit(1);
      break;
     default: printf("In parent process (ID: %d)\n", pid);
      for(i=0;i<n;i++)
{
        printf("Enter the string %d:- ",i+1);
        scanf("%s",buffr1[i]);
      }
      write(p[1],buffr1,sizeof(buffr1));
      waitpid(pid,NULL,0);
      read(p2[0],buffr2,sizeof(buffr2));
      printf("In parent process (ID: %d)\n", pid);
      n=(int) buffr2[0][0];
      for(i=1;i<=n;i++)
        printf("Palindrome %d:- %s\n",i,buffr2[i]);
      break;
}
    close(p[0]);
    close(p[1]);
close(p2[0]);
close(p2[1]);
    return 0;
}