CODEWITHSUNDEEP
cpointersdata-structures
mane
mane

Reputation: 2243

Passing pointer to a function

//old and auqHdr are data structures of type gblAuqEntry and auQ respectively
//I traverse through the list 'auqHdr' and when I match the element 'old', I need to remove it

removeAUfromNodeAUQ(&old, &auqHdr);  


//Function implementation
static void removeAUfromNodeAUQ(gblAuqEntry *old, auQ *auqH)
{
    auQ *auqPtr, *prev;
int found =0;
for (auqPtr = auqH; auqPtr; auqPtr = auqPtr->nxt)
{
    if (something)
        prev = auqPtr;
    else
    {
        prev->nxt = old->nxt;
        found = 1;
        break;
    }
}

I am trying to remove the element 'old' in the list 'auqHdr'.

The error I am getting is "declaration is incompatible with previous "removeAUfromNodeAUQ"" Can someone please point out what I am doing wrong here?

Thanks

Upvotes: 2

Views: 95

Answers (2)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 727047

If you call the function before declaring it, C implies a return type of int, not void.

You should add this declaration in the header or at the top of your file to address the problem:

static void removeAUfromNodeAUQ(gblAuqEntry *old, auQ *auqH);

Upvotes: 2

Ed Swangren
Ed Swangren

Reputation: 124790

Well, if your code is exactly as you posted, then this:

removeAUfromNodeAUQ(&old, &auqHdr);

Is not a function call, it is a function declaration. You then define it, but with a different signature. In that context you are forward declaring a function. C assumes a return type of int for you.

Upvotes: 2

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