[Pawnie]

Try something like this

PHP код:

CMD:tod(playerid, params[])
{
    if (PlayerInfo[playerid][pAdmin] < 1337) return SendClientMessageEx(playerid, COLOR_GRAD1, "You are not authorized to use that command!");
    new string[128], time;
    if(sscanf(params, "d", time)) return SendClientMessageEx(playerid, COLOR_WHITE, "USAGE: /tod [time] (0-23)");
    SetWorldTime(time);
    format(string, sizeof(string), "Time set to %d:00.", time);
    BroadCast(COLOR_GRAD1, string);
    return 1;
} 


or even shorter version and more simpler to use

PHP код:

COMMAND:settime(playerid, params[])
{
    new time;
    if(sscanf(params, "i", time)) return SendClientMessage(playerid, -1, "Usage: /settime [time]");
    if(time > 24 || time < 0) return SendClientMessage(playerid, -1, "Error: Invalid time!");
    SetWorldTime(time);
    return 1;
}