[CMINDEXSEBYTRECORD@EETHIS ROUTINE CREATES AND ACCESSES RANDOM ACCESS FILES FOR FIXEDLENGTH RECORDS... COMMANDS ARECMD=1 WRITE NTH RECORDCMD=2 READ NTH RECORDCMD=3 UPDATE NTH RECORD((RECORD$ IS THE INPUT/OUTPUT RECORDN IS THE RECORD NUMBER==INDEX IS A TWO DIMENSIONAL ARRAY DIM'ED INDEX(1,RECNUM)11INDEX HOLDS THE NOTE VALUES FOR ALL RECORDSBBTHIS ROUTINE ASSUMES LOGICAL FILE #1 HAS BEEN OPENED FOR I/OL`ROUTINE BEGINS AT 1200jA A0A@""............................4WRITE NTH RECORD@68<,-68<,-` (@$ ""............................ READ NTH RECORD  6-8<,6-8<, @ @ $""............................UPDATE NTH RECORD6-8<,6-8<,@(@$ D:CH9PRG1.BAS