[The_Moddler]

pawn Code:

if(strcmp("/try", cmdtext, true, 4) == 0)
    {
        if(strlen(cmdtext) == 0) return SendClientMessage(playerid, 0xFFFFFFFF, "Ussage: /try [text]");
        {
            new name[25], string[64];
             GetPlayerName(playerid, name, 25);
               switch(random(3))
             {
                  case 0:
                {
                    format(string, 64, "%s Tries to: %s and succeeds", name, cmdtext);
                    SendClientMessage(playerid, 0xF9B7FFAA, string);
                }
                case 2:
                {
                    format(string, 64, "%s Tries to %s but fails", name, cmdtext);
                    SendClientMessage(playerid, 0xF9B7FFAA, string);
                }
                case 3:
                {
                    format(string, 64, "%s Tries to %s but fails", name, cmdtext);
                    SendClientMessage(playerid, 0xF9B7FFAA, string);
                }
             }
        }
        return 1;
    }

This will work, but only will appear "yourname Tries to /try but fails".. or "yourname Tries to /try and succeeds"

Modify it with sscanf.. or better use zcmd and there is no need of sscanf for this.