c - Segmentation fault (core dumped) in some cases -

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any idea why program fail in downloading images page #12 while did pages 1-9 perfectly? don't know how can debug. maybe there's problem wget when doesn't find first image? http://img717.imageshack.us/img717/7954/white2u.png

#include <stdio.h> #include <stdlib.h> // using system calls #include <unistd.h> // sleep  int main () {     char  body[] = "forum-post-body-content", notes[] = "p-comment-notes", img[] = "img src=", link[200], cmd[200]={0}, file[10];     int c, pos = 0, pos2 = 0, fin = 0, i, j, num = 0, found = 0;     file *fp;      (i = 12; <= 149; ++i)     {         sprintf(cmd,"wget -o page%d.txt 'http://www.mtgsalvation.com/forums/creativity/artwork/340782-official-digital-rendering-thread?page=%d'",i,i);         system(cmd);         sprintf(file, "page%d.txt", i);         fp = fopen (file, "r");         while ((c = fgetc(fp)) != eof)         {             if (body[pos] == c)             {                 if (pos == 22)                 {                     pos = 0;                     while (fin == 0)                     {                         c = fgetc (fp);                         if (feof (fp))                             break;                         if (notes[pos] == c)                         {                             if (pos == 14)                             {                                 fin = 1;                                 pos = -1;                             }                             ++pos;                         }                         else                         {                             if(pos > 0)                                 pos = 0;                         }                         if (img[pos2] == c)                         {                             if (pos2 == 7)                             {                                 pos2 = 0;                                 while (found == 0)                                 {                                     c = fgetc (fp); // char file                                     link[pos2] = c;                                     if (pos2 > 0)                                     {                                         if(link[pos2-1] == 'g' && link[pos2] == '\"')                                         {                                         found = 1;                                         }                                     }                                     ++pos2;                                 }                                 --pos2;                                 found = 0;                                 char link2[pos2];                                 (j = 1; j < pos2; ++j)                                 {                                     link2[j - 1] = link[j];                                 }                                 link2[j - 1] = '\0';                                 sprintf(cmd, "wget -o /home/arturo/dropbox/digital_renders/%d \'%s\'", ++num, link2);                                 system(cmd);                                 pos2 = -1;                             }                             ++pos2;                         }                         else                         {                             if(pos2 > 0)                                 pos2 = 0;                         }                     }                 fin = 0;                 }                 ++pos;             }             else                 pos = 0;         }         // closing file         fclose (fp);         if (remove (file))             fprintf(stderr, "can't remove file\n");     } } 

char file[10];

"page12.txt" has 11 characters in including null character. please char file[128]. memory cheap. time spent debugging expensive.


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