wotz f ????????? look like yu need tu integrate (dT/dt) tu get funk av time ??????? fortran ????... with THOUSNADS av nu software pakkages invented & 100+ more nu wons evree yeer... & yu want tu yuze old reliabel FORTRAN...oldest program lingo ever... ???? wot will become av the werld if yu dont lern nu programming lingo evree week?????