Databases
StackOverflow2013
Postsdbo
POfgetc not starting at beginning of file - c
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POfgetc not starting at beginning of file - c
    primarykey
    data
    text
    <p>Problem solved here: <a href="https://stackoverflow.com/questions/20341044/fgetc-not-starting-at-beginning-of-large-txt-file">fgetc not starting at beginning of large txt file</a></p> <p>I am working in c and fgetc isn't getting chars from the beginning of the file. It seems to be starting somewhere randomly within the file after a <code>\n</code>. The goal of this function is to modify the array productsPrinted. If "More Data Needed" or "Hidden non listed" is encountered, the position in the array, productsPrinted[newLineCount], will be changed to 0. Any help is appreciated. </p> <p>Update: It works on smaller files, but doesn't start at the beginning of the larger,617kb, file.</p> <p>function calls up to category:</p> <pre><code>findNoPics(image, productsPrinted); findVisible(visible, productsPrinted); removeCategories(category, productsPrinted); </code></pre> <p>example input from fgetc():</p> <pre><code>Category\n Diagnostic &amp; Testing /Scan Tools\n Diagnostic &amp; Testing /Scan Tools\n Hidden non listed\n Diagnostic &amp; Testing /Scan Tools\n Diagnostic &amp; Testing /Scan Tools\n Hand Tools/Open Stock\n Hand Tools/Sockets and Drive Sets\n More Data Needed\n Hand Tools/Open Stock\n Hand Tools/Open Stock\n Hand Tools/Open Stock\n Shop Supplies &amp; Equip/Tool Storage\n Hidden non listed\n Shop Supplies &amp; Equip/Heaters\n </code></pre> <p>Code:</p> <p>void removeCategories(FILE *category, int *prodPrinted){</p> <pre><code>char more[17] = { '\0' }, hidden[18] = { '\0' }; int newLineCount = 0, i, ch = 'a', fix = 0; while ((ch = fgetc(category)) != EOF){ //if fgetc is outside while, it works// more[15] = hidden[16] = ch; printf("%c", ch); /*shift char in each list &lt;- one*/ for (i = 0; i &lt; 17; i++){ if (i &lt; 17){ hidden[i] = hidden[i + 1]; } if (i &lt; 16){ more[i] = more[i + 1]; } } if (strcmp(more, "More Data Needed") == 0 || strcmp(hidden, "Hidden non listed") == 0){ prodPrinted[newLineCount] = 0; /*printf("%c", more[0]);*/ } if (ch == '\n'){ newLineCount++; } } </code></pre> <p>}</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. USTinMan
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POfgetc not starting at beginning of file - c
      1. This table or related slice is empty.
      1. VTModeratorReview
    1. CO[`fseek`](http://www.cplusplus.com/reference/cstdio/fseek/) to beginning of file first (im guessing your using this `FILE *` in other places or calling this function multiple times
      singulars
      1. POfgetc not starting at beginning of file - c
      1. USamdixon
    2. COThis is very closely related to [`fgetc()` not working — returns same char repeatedly](http://stackoverflow.com/questions/20158061/fgetc-not-working-c-returns-same-char-repeatedly). The specific flaw identified for that question has been fixed (it would be good if you accepted the answer — it lets people know you appreciate their help). The loops _have_ changed; the indentation is still erratic. The structure is similar — and the intent still ill defined.
      singulars
      1. POfgetc not starting at beginning of file - c
      1. USJonathan Leffler
    3. CO(a) What is this program/function trying to do; (b) what does the calling code look like? You should review what happens when you read EOF (you certainly do processing of data after it occurs as if it has not occurred). It would help enormously to have a few (2-5) lines of input data, and the expected output from those lines of input.
      singulars
      1. POfgetc not starting at beginning of file - c
      1. USJonathan Leffler
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload