almost solved i think

SUBMITTED BY: Guest

DATE: Oct. 25, 2014, 12:03 p.m.

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SIZE: 635 Bytes

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  1. char *strsub(char *s,char *pat,char *rep)
  2. {
  3. char *ptr, *tptr;
  4. int plen,rlen;
  5. tptr=ptr=s;
  6. plen=strlen(pat);
  7. rlen=strlen(rep);
  9. if ((ptr=strstr(s,pat))==NULL)
  10. {
  11. return NULL;
  12. }
  14. tptr = (char*)calloc(strlen(rep) + 1,sizeof(rep[0]));
  16. if (tptr==NULL)
  17. return NULL;
  19. strcpy(tptr,ptr+plen);
  21. while(rlen--)
  22. {
  23. *ptr++=(*(rep++));
  24. }
  25. strsub(s,pat,rep);
  26. free(tptr);
  27. return (ptr);
  28. }
  29. int main()
  30. {
  31. char* s={"This is an issue"};
  32. char* pat={"is"};
  33. char* rep ={"ere"};
  34. printf("%s",strsub(s,pat,rep));
  36. getch();
  37. }
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