Thread: Linked list help

Originally Posted by quzah

You didn't include how you call it, which is kinda relevant.

Code:

In main:

type *mylist = NULL;
...
yourfun( file1, file2, &mylist );

Quzah.

Ooops...sorry. I must have accidentally deleted it while condensing the code.

I originally had:

Code:

bldList (spListData, spModList, &ptLnkList);

but

Code:

bldList (spListData, spModList, ptPtLnkList);

segfaults too.

Originally Posted by quzah

Ok, skip all the file crap for the moment:

Code:

type *p = NULL;
...
foo( &p );
...
void foo( type **p )
{
    if( p )
    {
        type *n = malloc( sizeof *n );
        ...
        *p = n;
    }
}

That'll put the new n's address in p back in main.


Quzah.

Thank you. That's seems to have worked in so far as the program no longer segfaults when it's in that function. It now segfaults in another function.

Nearest I can figure, is that there is something wrong with how I am coding the list traversal:

Code:

bool srchList (struct node** ptPtLnkList, int target)
{
    bool found;
    struct node* ptCur;

    found = false;
    ptCur = *ptPtLnkList;

    if (*ptPtLnkList == NULL)
       {
            printf("Error: list is empty");
            exit(201);
       }

    while (found == false && ptCur -> listEl != target && ptCur != NULL)
        {
            printf("Target not found yet 1\n");
            ptCur = ptCur -> link;
            printf("Target not found yet 2\n");
        }

    if (ptCur -> listEl == target)
       {
              printf("Assigning true to found");
              found = true;
       }

    return found;
}

I realize that no-one here is at my beck-and-call, but I would appreciate an explanation or, at least, a link to an explanation of what I am doing wrong. I really am here to learn what I am doing wrong so I can avoid it in the future.