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1. Description:Delete a pattern from the string. Also illustrates how gets() may be implemented

Any questions mail them to cpp@teentwo.8m.com

1. Delete a pattern from the string. Also illustrates how gets() may be implemented

#define SIZE 1024
void *my_get(char user[], int size, FILE *fp);
int pattern(char origin[], char pattern[]);

main(int argc, char *argv[])
{
  char *user;
  FILE *fp;
  if(argc !=3 )
  {
    printf("Usage: %s <file> <pattern>\n", argv[0]);
    exit(0);
  }
  if((fp = fopen(argv[1], "r")) == NULL)
  {
    perror(argv[1]);
    exit(1);
  }
  user = (char *)calloc(SIZE, sizeof(char));
  while((my_get(user, 1024, fp))!=NULL)
  {
    pattern(user, argv[2]);
    printf("%s", user);
  }
  return 0;
}

int pattern(char origin[], char pattern[])
{
  int o, k, p;
  int f;
  for(o=0,f=0;origin[o];o++)
  {
    for(k=o,p=0;pattern[p] && pattern[p] == origin[k];k++,p++);
     if(pattern[p] == NULL)
      o += strlen(pattern)-1;
     else
      origin[f++] = origin[o];
  }
  origin[f] = '\0';
  return 0;
}

void *my_get(char user[], int size, FILE *fp)
{
  int c, i;
  for(i=0;i < size-1 && (c = getc(fp)) != '\n' && c != EOF; i++)
    user[i] = c;
  if(c != EOF)
  {
    user[i++] = c;
    user[i] = '\0';
    return c;
  }
  return NULL;
}

Any questions mail them to cpp@teentwo.8m.com

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