Try this.

void do_olevel(CHAR_DATA *ch, char *argument)
{
    char buf[MAX_INPUT_LENGTH];
    BUFFER *buffer = new_buf();

    OBJ_DATA *obj = NULL;
    OBJ_DATA *in_obj = NULL;
    bool found = FALSE;
    int count = 0;
    int page = 1;
    int max_pages = 0;
    int per_page = 100;

    char name[MAX_INPUT_LENGTH] = "";
    int iLevel = 0;
    int iPage = 0;
    int match = 0;

    if (!argument || !*argument || strlen(argument) > MAX_INPUT_LENGTH) {
        send_to_char("Syntax:  olevel [level] <name> [page]\n\r", ch);
        send_to_char("         olevel <level> [page]\n\r", ch);
        free_buf(buffer);
        return;
    }

    match = sscanf(argument, " %d %s %d ", &iLevel, name, &iPage);
    if (match == 3) {
        // We got all three valid arguments.
    } else {
        match = sscanf(argument, " %d %d ", &iLevel, &iPage);
        if (match == 2) {
            // We got our level and page.
        } else {
            match = sscanf(argument, " %d %s ", &iLevel, name);
            if (match == 2) {
                // We got level and name.
            } else {
                match = sscanf(argument, " %s %d ", name, &iPage);
                if (match == 2) {
                    // We got name and page.
                } else {
                    match = sscanf(argument, " %s ", name);
                    if (match == 1) {
                        // Only the name.
                    } else {
                        // Invalid input.
                        send_to_char("Syntax:  olevel [level] <name> [page]\n\r", ch);
                        send_to_char("         olevel <level> [page]\n\r", ch);
                        free_buf(buffer);
                        return;
                    }
                }
            }
        }
    }

    page = iPage;
    if (page < 1)
        page = 1;
    if (page > 99)
        page = 99;

    sprintf(buf, "{RObject{G  Level{R     Object Name                  Mobile      Mob/Character                Room   "
                 "         Room Name{x\n\r");
    add_buf(buffer, buf);
    sprintf(buf, "{w---------------------------------------------------------------------------------------------------"
                 "-----------------------{x\n\r");
    add_buf(buffer, buf);

    for (obj = object_list; obj != NULL; obj = obj->next)
    {
        if (!can_see_obj(ch, obj) || ch->level < obj->level)
            continue;

        if ((iLevel != 0 && iLevel != obj->level) || (name[0] != '\0' && !is_name(name, obj->name)))
            continue;

        count++;

        if (count <= (page - 1) * per_page)
            continue;

        if (count > page * per_page)
            break;

        found = TRUE;

        for (in_obj = obj; in_obj->in_obj != NULL; in_obj = in_obj->in_obj)
            ;

        if (in_obj->carried_by != NULL && can_see(ch, in_obj->carried_by) &&
            !is_name(KEYSTRING, in_obj->carried_by->name) && in_obj->carried_by->in_room != NULL)
        {
            sprintf(buf, "{*[{R%5d{*] {*[{G%3d{*]{x %-30.30s   {*[{R%5d{*] {x%-30.30s   {*[{R%5d{*] {x%-30.30s{x\n\r",
                    obj->pIndexData->vnum, obj->pIndexData->level, obj->short_descr,
                    IS_NPC(in_obj->carried_by) ? in_obj->carried_by->pIndexData->vnum : 0, PERS(in_obj->carried_by, ch),
                    in_obj->carried_by->in_room->vnum, in_obj->carried_by->in_room->name);
        }
        else if (in_obj->in_room != NULL && can_see_room(ch, in_obj->in_room))
        {
            sprintf(buf,
                    "{*[{R%5d{*] {*[{G%3d{*]{x %-30.30s                                            {*[{R%5d{*] "
                    "{x%-30.30s{x\n\r",
                    obj->pIndexData->vnum, obj->pIndexData->level, obj->short_descr, in_obj->in_room->vnum,
                    in_obj->in_room->name);
        }
        else
        {
            sprintf(buf, "{*[{R%5d{*] {*[{G%3d{*]{x %-30.30s    {xsomewhere\n\r", obj->pIndexData->vnum,
                    obj->pIndexData->level, obj->short_descr);
        }

        add_buf(buffer, buf);
    }

    if (!found)
    {
        send_to_char("Nothing like that in heaven or earth.\n\r", ch);
        free_buf(buffer);
        return;
    }

    max_pages = (count + 99) / per_page;

    if (page > max_pages)
    {
        send_to_char("Invalid page number.\n\r", ch);
        free_buf(buffer);
        return;
    }

    sprintf(buf, "\n\rPage %d/%d\n\r", page, max_pages);
    add_buf(buffer, buf);

    page_to_char(buf_string(buffer), ch);
    free_buf(buffer);
}