Дмитрий

char *ft_strstr(char *str, char *to_find)
{
  int i1 = 0, i2 = 0, r = -1;
  bool check = false;

  while(str[i1] != '\0') //запускаю на проверку строку
  {
    for (i2=0; to_find[i2] != '\0'; i2++)
    {
        if(str[i1+i2] != '\0' && str[i1+i2] == to_find[i2])
            check = true;
        else
        {
            check = false;
            break;
        }
    }
    if (check)
    {
        r = i1;
        break;
    }
    i1++;
  }

  return (&str[r]);
}