looping problem

Ok.very weird problem. Thanks to whoever can helpme here.

I have these double linked lists defined properly and working fine. I call them "pNode", and "pNode3".

The data inside pNode contains strings of words that I gathered from a text file.

Now, I need to start from the head of the pNode (I called it pHead) and go until end of the line 1 AND add all the data from pNode to pNode3 (I do the add with adddll3 function....

Now the problem starts.... on second itteration, I need to add the data from line 2 of pNode to pNode3... such that pNode3 now contains only the data of line 2 of pNode.......

It is done until there is no more data .......


What the following does is .. it takes in line 1 on 1st iteration, then line 1 &2 on second iteration, then line 1,2,3 on 3rd iteration.... and so forth. I need to take in line 1 for 1st, then on second line 2 such that the contents of the Pnode3 is overwritten with this content.......

please help me

Code:

---

pNode=pHead;
pNode3=PHead3;

for(pNode;pNode!=EOF ; pNode=pNode->pNext)
{
        for(pNode;strcomp(pNode->nData,newlinetest)!=0;pNode=pNode->pNext)
      {
            adddll3(pNode->nData);
        }
 
                printf("\n******** \n");

                display3(pNode3);
                printf("\n");
 }

---

the display function just displays everything inside the the pNode3....

pelase help me... I am desperate.... thnks

What does your adddll3() function look like?
Is newlinetest just a char set to '\n'?

Code:

---

  char *newlinetest=malloc(100*sizeof(char));
    strcpy(newlinetest,"\n");

---

this is my newline test

Code:

---

void adddll3(char *ch2)
{
    pNode3 = malloc (sizeof (struct NODE2));
    pNode3->nData = ch2;
    if (pHead3 == NULL) { /*pHead 3 i just the head pointer for pNode3*/
        pHead3 = pNode3;
        pNode3->pPrev  = NULL; /*pPrev and pNext are the previous and next pointer in the structure def of the double linked list*/
    }
    else {
        pTail3->pNext = pNode3; /*pTail3 is just the Tail pointer of double linked list pNode3*/
        pNode3->pPrev = pTail3;
    }
    pTail3  = pNode3;
    pNode3->pNext = NULL;

}

---

Code:

---

/*structure of the double linked list*/
struct NODE2
{
    struct NODE2 *pNext;
    struct NODE2 *pPrev;
    char* nData;
}*pHead, *pTail, *pNode, *pHead3,*pTail3,*pNode3;

---

strcpy(newlinetest,"\n");
Double quotes, I.e. " " represent a string, so your newlinetext variable is equal to:
newlinetest[0] = '\'
newlinetest[1] = 'n'
Try changing the double quotes, to single quotes, I.e. '\n'
Single quotes are meant to represent characters (in the case, the newline character).

I believe (for what I think you're trying to do) that this change is needed. Don't know if it will solve your problem, but it was just the first thing I noticed. I'm gonna keep looking here some more...

Quote:

---

Originally Posted by Epo

strcpy(newlinetest,"\n");
Double quotes, I.e. " " represent a string, so your newlinetext variable is equal to:
newlinetest[0] = '\'
newlinetest[1] = 'n'
Try changing the double quotes, to single quotes, I.e. '\n'
Single quotes are meant to represent characters (in the case, the newline character).

I believe (for what I think you're trying to do) that this change is needed. Don't know if it will solve your problem, but it was just the first thing I noticed. I'm gonna keep looking here some more...

---

Wrong!

strcpy(newlinetest,"\n");
variable is equal to:
newlinetest[0] = '\n'
newlinetest[1] = 0
\n is interpreted by the compiler as an escape sequence. These escape sequences represent a character. \n means 13 ascci which is a newline.

Code:

---

for(pNode;pNode!=EOF ; pNode=pNode->pNext)

---

What the hell are you doing?

If you're looking for help, you're going about it horribly wrong:
1) Your variable and function names are horrible.
2) You gave a horrible description of the problem.
3) Likewise, a horrible description of what it is you're trying to do.
4) Furthermore, a horrible description of what your nodes contain.
5) It's horrible that I can't find more ways to call this horrible.

What exactly does nData contain? Multiple lines? One line? Do you have a linked list where each node contains a single line? Are you trying to concatenate all of them into a single node? What exactly?

This should be trivially easy to fix, however, I have no idea what it is you're trying to do.

Quzah.