Problem with writing in a file using fprintf

Good morning!

I have a problem using fprintf.
I try to print a linked list which consists of nodes(structs).
When i try to print the list to the standard output using printf evrything is ok
e.g. i do :

printf("%d, %d, %s, %s\n",p->l, p->t, p->a, p->b);

//p is pointer to the struct

Now i try to print the linked list in a file i do:

Code:

---

if( ( fp = fopen(argv[1],"w") ) == NULL )
                        printf("File couldn't be opened\n");
                else {
                        p = head;
                        while( p != NULL) {
                                fprintf(fp, "%d, %d,%s,%s\n",p->l, p->t, p->a, p->b);
                                p = p->next;
                                        }
                        }
                fclose(fp);

---

But nothing is being typed to the file!
What do i do wrong?

Thanks in advance!

Well nothing looks to me wrong over in the above code. Post use some more code.

Need proper indendation

Code:

---

if( ( fp = fopen(argv[1],"w") ) == NULL )
    printf("File couldn't be opened\n");
else
{
    p = head;
    while( p != NULL)
    {
            fprintf(fp, "%d, %d, %s, %s\n",p->l, p->t, p->a, p->b);
            p = p->next;
    }
}
fclose(fp);

---

ssharish2005

Well the problem is with that fprintf,
The other program is fine as i can see
cause when i try to print the list using the printf
the list is printed! :)

well your fprintf statment is right, it follows the synatx and looks to me right

ssharish2005

Well, now it works!
I don't know why it works now,I just changed the input file i was giving previously!
Now everything seems fine for the time being!

Thank you! :)

Quote:

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Originally Posted by g_p

Well, now it works!
I don't know why it works now,I just changed the input file i was giving previously!
Now everything seems fine for the time being!

Thank you! :)

---

You shouldn't feel satisfied just because the problem inexplicably disappears. Go back to file that wasn't working and figure out why.