[JaTochNietDan]

When comparing variables in Pawn you need two equal signs to simulate if equal to. Like so

pawn Код:

if(strcmp(cmd, "/checkooc", true) == 0)
    {
        if(IsPlayerConnected(playerid))
        {
            if (OOCStatus == 0)
            {
                SendClientMessage(playerid, COLOR_LIGHTYELLOW2, "OOC Is Currently Disabled");
            }
            else
            {
                SendClientMessage(playerid, COLOR_LIGHTYELLOW2, "OOC Is Currenly Enabled");
            }
        }
        return 1;
    }

There's also no need for an extra check, since you already know if it's not 0 it must be enabled.