data lab edit insert half full

 void Display_Array(int b[],int k);
 void Edit(int b[],int pp,int vv);
 int Insert_LastPosition(int b[],int nn,int vv);
 int Insertion_SpecificPosition(int b[],int nn,int vv,int pp);
 int Deletion(int b[],int nn,int pp);
int main()
{
int a[100],n,i,c,b=1,v,p;
 printf("\n Enter how many value\n");
 scanf("%d",&n);
 printf("\n Enter value\n");
 for(i=1;i<=n;i++)
  scanf("%d",&a[i]);
  while(b)
  {
     printf("\n-----Menu----\n");
     printf("\n Press 0 for Quite\n");
     printf("\n Press 1 for Display\n");
     printf("\n Press 2 for Insertion at last position\n");
     printf("\n Press 3 for Insertion at specific position\n");
     printf("\n Press 4 for Delete from specific position\n");
     printf("\n Press 5 for Linear search\n");
     printf("\n Press 6 for Bubble Sort \n");
     printf("\n Press 7 for Binary Search\n");
     printf("\n Press 8 for Edit\n");
     printf("\n Enter your choice\n");
     scanf("%d",&c);

    switch(c)
            {

                case 0:  b=0;

                break;

              case 1: printf("\n choice Display\n");

            if(n!=0)

                  Display_Array(a,n);
            else
                printf("\n No data to display\n");

                break;

                case 8: printf("\n choice=Edit\n");

                if(n!=0)
                {
                    printf("\n Enter new value\n");
                    scanf("%d",&v);
                    M: printf("Enter position between  %d to %d\n",1,n);
                       scanf("%d",&p);
                if (p>=1 && p<=n)

                    Edit (a,p,v);

                else
                    {
                        printf("\n Wrong Position\n");
                        goto M;
                    }
               }
                       else
                          printf("No data to Edit\n");

                       break;
                       case 2:printf("\n Choice=Insertion at last position\n");
                            printf("\n Enter new values\n");
                            scanf("%d",&v);
                            n=Insert_LastPosition(a,n,v);
                     break;


                       case 3:printf("\n Choice=Insertion at specification\n");

                       if(n!=0)
                       {
                          k:printf("\n Enter position between %d to %d\n",1,n+1);
                          scanf("%d", &p);
                       if(p>=1 && p<=n+1)
                         {
                             printf("\n Enter new value \n");
                             scanf("%d",&v);
                             n=Insertion_SpecificPosition(a,n,v,p);
                             printf("\n\n Inserted at position %d\n",p);
                         }
                         else
                           {
                               printf("\n Wrong position\n");
                               goto k;
                           }
                           }

                        else
                           printf("\n The array is empty\n");


                       case 4:printf("\n Choice=Delete from Array\n");

                       if(n!=0)
                       {
                           z:printf("\nEnter Position between %d to %d",1,n);
                           scanf("%d",&p);
                       if(p>=1 && p<=n)
                       {
                           printf("\n Deleted value= %d\n",a[p]);
                           n=Deletion(a,n,p);
                           printf("\n Deleted sucessfully from position %d\n",p);
                       }

                       else
                           {
                               printf("\n Wrong position\n");
                               goto z;
                           }
                           }

                      else
                           {

                           printf("\n No data to Delete\n");

                     break;
                       }

            default: printf("\n wrong choice\n");
            break;
            }
     }
}

        void Display_Array(int b[],int k)
        {

             int j;
              printf("\n The values are:\n");
              for(j=1;j<=k;j++)
               printf("%d\n",b[j]);
        }
        void Edit (int b[],int pp,int vv)
        {
            b[pp]=vv;
            printf("\n Edited Succesively\n");
        }
       int Insert_LastPosition (int b[],int nn,int vv)
       {
           b[nn+1]=vv;
           printf("\n Inserted successfully \n");
           return nn+1;
       }

    int Insertion_SpecificPosition(int b[],int nn,int vv,int pp)
    {
        int j;
        for(j=nn;j>=pp;j--)
        b[j+1]=b[j];

        b[pp]=vv;

        return nn+1;

    }
    int Deletion(int b[],int nn,int pp)
    {
        int j;
        for(j=pp;j<nn;j++)
        b[j]=b[j+1];
        return nn-1;
    }