1 ! PROGRAM NAME --> U N C D E N  -- BY BOB HUNTSMAN
11 DIM B2$(3%),B2%(3%):B2$(1%)="LET'S START WITH":B2$(2%)=
	"NOW SOME":B2$(3%)="FINALLY, SOME":B2%(1%)=5%:B2%(2%)=3%:
	B2%(3%)=2%:B2%(0%)=5%:B%=0%
12 OPEN "KB:" AS FILE 1%:INPUT #1%,"NAME PLEASE (CR)---> ";N$:
	V9$=SYS(CHR$(3%)):FIELD #1%,K% AS Q$,1% AS M3$(K%)
	 FOR K%=0% TO 10%:RANDOM
20 DIM S$(3%):S$(0%)="-":S$(1%)="+":S$(2%)="SUBTRACT":S$(3%)="ADD"
25 DIM B$(7%):B$(1%)="EASY":B$(2%)="MEDIUM":B$(3%)="HARD":B$(4%)="WRONG":B$(5%)="RIGHT":B$(6%)="LOW":B$(7%)="HIGH"
30 PRINT "ENTER 'I' FOR INSTRUCTIONS:";:GOSUB 29000:PRINT M4$:GOTO 135
	IF M4$<>"I"
50 PRINT:PRINT "THE REQUIREMENTS ARE:":PRINT
55 PRINT "YOU MUST ANSWER 5 EASY PROBLEMS, 3 MEDIUM ";
	"PROBLEMS, AND 2 HARD"
60 PRINT "PROBLEMS.  YOU'LL BE GIVEN THREE TRIES TO ANSWER EACH ";
	"PROBLEM; HOWEVER"
65 PRINT "ONLY PROBLEMS ANSWERED CORRECTLY THE FIRST TRY ARE ";
	"SCORED AS CORRECT"
70 PRINT "ANSWERS.  YOU MUST GET 80% OF THE EASY ONES CORRECT, 70% ";
	"OF THE MEDIUM"
75 PRINT "ONES CORRECT AND 50% OF THE HARD ONES CORRECT (THEY ARE ";
	"R E A L L Y"
85 PRINT "HARD) IN ORDER TO PASS.  IF YOU PASS, THE COMPUTER WILL TELL";
	" YOU AND"
90 PRINT "ALLOW YOU TO GO ON THE NEXT PROGRAM.  BY THE WAY, IF YOU ";
	"WANT TO KNOW":PRINT "HOW ";
95 PRINT "YOU'RE DOING ENTER '?' WHEN ASKED FOR YOUR ANSWER.  IF YOU ";
	"GIVE UP,"
100 PRINT "ENTER 'Q' FOR YOUR ANSWER AND THE PROGRAM WILL TERMINATE!!":
	PRINT:PRINT
110 PRINT "IF THE PROGRAM PRINTS OUT '(CR)--->', THAT MEANS YOU MUST":
	PRINT "HIT THE RETURN KEY AFTER YOU INPUT YOUR ANSWER.  IF ";
	"THAT IS":PRINT "NOT THERE, YOU NEED NOT HIT THE 'RETURN' KEY!!"
	:PRINT
111 RANDOM:GOTO 135
130 GOTO 1300 IF X%(B%+3%)=0%:GOTO 1300 IF B2%(B%)>X%(B%):
	GOTO 1300 IF 100%*X%(B%)/X%(B%+3%)<35%+15%*(4%-B%)
135 GOTO 1200 IF B%=3%:B%=B%+1%:PRINT:PRINT B2$(B%);" ";B$(B%);" ONES:":
	PRINT:GOTO 130
200 GOTO 130 IF F6%=0%:F6%=0%:GOTO 230 IF B%:PRINT
	"GO BACK AND REDO PROGRAM #7, U N R D C E !!!":
	GOTO 32000
230 PRINT "REDO THE ";B$(B%);" PROBLEMS!!":
	X%(B%),X%(B%+3%),X%(B%+1%),X%(B%+4%)=0%:GOTO 200
600 PRINT "VERY GOOD!":PRINT:GOTO 1465
640 DEF FNN$(V%)=MID(NUM$(V%),2%,LEN(NUM$(V%))-2%)
800 X3%=X3%+1%:H5%=H5%+1% IF B%=3%:X%=X%+1%:X%(B%+3%)=X%(B%+3%)+1%:
	X%(B%)=X%(B%)+1% IF E%=3%
810 RETURN IF E%=3% OR X%(B%+3%)<3%+B2%(B%):F6%=1%:PRINT
	:B%=B%-1%:PRINT N$;" -- YOU ARE NOT DOING VERY WELL ON ";
	"THESE PROBLEMS.  YOU MUST":RETURN
900 D%=0%:D1%=INT(LOG10(C1%))+1%:FOR K1%=1% TO D1%
910 GOSUB 29000:GOTO 920 IF M4$="?":GOTO 940 IF M4$="Q":
	M%=ASCII(M4$):GOTO 910 IF (M%=13% OR M%=32%) AND D%=0%:RETURN
	IF M%=13% OR M%=32%:GOTO 910 IF M%<48% OR M%>57%:
	D%=D%*10%+M%-48%:PRINT M4$;:NEXT K1%:RETURN  
920 F4%=0%:F4%=1% IF X%(K%) FOR K%=4% TO 6%:GOTO 910 IF F4%=0%
930 X%=POS(1%):PRINT M4$;:A1%=A%:B1%=B%:GOSUB 32005:A%=A1%:B%=B1%:
	PRINT TAB(X%-4%);"---> ";:GOTO 900
940 PRINT:PRINT:PRINT "SORRY, ";N$;" -- YOU DO NOT PASS. . .":
	GOTO 32000
1000 DEF FNR%(V%,V1%)
1010 V2%=V1%-V%+1%:V3%=INT(1000%*RND):V3%=V3%-V3%/V2%*V2%+V%:FNR%=V3%
1020 FNEND
1100 DEF FNX%=X%(1%)+X%(2%)+X%(3%)
1200 PRINT:PRINT "CONGRATULATIONS, ";N$;".  YOU HAVE SUCCESSFULLY PASSED"
1210 PRINT "THE REQUIREMENTS OF THIS PROGRAM!!  YOU NOW MAY GO ON TO
1220 PRINT "THE NEXT PROGRAM, #9, NAMED -FRACMT-!!":PRINT:GOTO 32000
1300 E%=3%:H%=1%:I%=11%
1315 C%=FNR%(B%*3%-2%,B%*3%+3%):GOTO 1315 IF C%=1% UNLESS
	FNR%(1%,5%)=4%
1317 B1%=FNR%(H%,I%):B2%=FNR%(H%,I%):GOTO 1317 IF FNC%(B1%,B2%)>2%:
	GOTO 1317 IF B1%*C%=B3%:B3%=B1%*C%:B2%=B2%*C%:GOTO 1400
1325 PRINT TAB(15%);:PRINT "-";FOR K%=1% TO L%:PRINT:PRINT "DENOMINATOR:";TAB(20%);FNN$(L2%)
1335 PRINT "ENTER ANSWER BELOW:":PRINT:PRINT "NUMERATOR:";TAB(16%);
	:C1%=N1%+N2%:C1%=C1%-N2%*2% IF S%=0%:GOSUB 900:A5%=D%:
	B5%=A%:B5%=L2% IF L2%>A%:B5%=LEN(FNN$(B5%))
1340 PRINT:PRINT TAB(16%);:PRINT "-";FOR K%=1% TO B5%:PRINT:
	PRINT "DENOMINATOR:";TAB(16%);:C1%=L2%:GOSUB 900:B5%=D%
1345 PRINT TAB(25%);:D%=FNC%(A5%,B5%):GOTO 1550 IF A5%*C%=A%
	AND B5%*C%=L2%
1350 GOTO 1500 IF A5%*C%=A%*D% AND B5%*C%=L2%*D%:PRINT
	"WRONG, ";N$;"!!"
1355 PRINT:IF E%>1% THEN PRINT "TRY AGAIN!! [";FNN$(N1%);"/";FNN$(L2%);" ";S$(S%);" ";FNN$(N2%);"/";FNN$(L2%);"].":PRINT:E%=E%-1%:GOTO 1335
1360 PRINT:PRINT "THAT'S ALL THE TRIES YOU GET ";N$;"!!!!":PRINT:PRINT
1365 PRINT "THE CORRECT ANSWER IS ";FNN$(A%);"/";FNN$(L2%);"."
1370 PRINT:GOSUB 800:GOTO 200
1400 B1%=90%*(B%-1%):B1%=30% IF B%=1%:GOTO 1315 IF
	B3%*B2%/FNC%(B3%,B2%)>B1%
1403 GOTO 1315 IF H%>=B3%-1%:A%=FNR%(H%,B3%-1%):
	GOTO 1403 IF FNC%(A%,B3%)<>1%
1405 A2%=FNR%(H%,B2%-1%):GOTO 1405 IF FNC%(A2%,B2%)<>1%
1415 IF A%*B2%<A2%*B3% THEN X9%=A%:A%=A2%:A2%=X9%:X9%=B3%:B3%=B2%:B2%=X9%
1420 S%=1%-S%:S%=1% IF X3%<4%
1425 IF A%*B2%<A2%*B3% AND S%=0% THEN X9%=A%:A%=A2%:A2%=X9%:
	X9%=B3%:B3%=B2%:B2%=X9%
1430 GOTO 1315 IF B2%=B3%
1435 PRINT:PRINT S$(S%+2%);" THESE FRACTIONS!!":PRINT:PRINT
	"NUMERATORS:";TAB(15%);
1440 L%=LEN(FNN$(B3%)):PRINT TAB(15%);FNN$(A%);TAB(24%);FNN$(A2%):
	PRINT TAB(15%);:PRINT "-";FOR K%=1% TO L%
1442 PRINT TAB(20%);S$(S%);
1445 PRINT TAB(24%);:L1%=LEN(FNN$(B2%)):PRINT "-";FOR K%=1% TO L1%:PRINT
1450 PRINT "DENOMINATORS:";TAB(15%);FNN$(B3%);TAB(24%);FNN$(B2%):PRINT
1455 L2%=B2%*B3%/FNC%(B2%,B3%):PRINT "WHAT IS THE COMMON DENOMINATOR? ";
	:C1%=L2%:GOSUB 900:C%=D%:
	PRINT TAB(40%);
1460 GOTO 600 IF C%=L2%:PRINT "NO IT ISN'T, IT'S THE LCM OF":PRINT
	TAB(40%);             "THE DENOMINATORS!!  WHAT IS THE":PRINT
	TAB(40%);             "LCM OF THE DENOMINATORS? ";:
	GOSUB 900:C%=D%:PRINT
1462 E%=2%:PRINT:GOTO 600 IF L2%=C%:PRINT "NO IT ISN'T, IT'S ";FNN$(L2%);".":PRINT:PRINT
1465 PRINT "PUT ";FNN$(A%);"/";FNN$(B3%);" & ";FNN$(A2%);"/";
	FNN$(B2%);" IN TERMS OF A/";FNN$(L2%);" ";S$(S%);" B/";
	FNN$(L2%):PRINT
1470PRINT "NUMERATORS:";TAB(15%);:C1%=L2%/B3%*A%:GOSUB 900:
	N1%=D%:PRINT TAB(20%);S$(S%);TAB(24%);:C1%=L2%/B2%*A2%:
	GOSUB 900:PRINT:N2%=D%
1475 L%=9%+LEN(FNN$(L2%/B2%*A2%)):PRINT TAB(15%);:PRINT "-";FOR K%=1% TO L%:PRINT
1480 PRINT TAB(20%);FNN$(L2%);TAB(30%);
1485 GOTO 1700 IF N1%*B3%<>L2%*A% OR N2%*B2%<>L2%*A2%
1487 PRINT "VERY GOOD!!":PRINT
1489 A%=N1%+N2%:A%=A%-2%*N2% IF S%=0%:C%=FNC%(A%,L2%):GOTO 1335
1500 PRINT "VERY GOOD -- NOW YOU MUST REDUCE IT!!":A%=A%/C%:L2%=L2%/C%
1505 PRINT:PRINT "NUMERATOR:";TAB(16%);:C1%=A%:GOSUB 900:PRINT:
	A6%=D%:L%=A%:L%=L2% IF L2%>A%:L%=LEN(FNN$(L%))
1510 PRINT TAB(16%);:PRINT "-";FOR K%=1% TO L%:PRINT
1515 PRINT "DENOMINATOR:";TAB(16%);:C1%=L2%:GOSUB 900:PRINT
	TAB(25%);:B6%=D%
1520 GOTO 1550 IF A6%=A% AND B6%=L2%:GOTO 1560
1550 PRINT "CORRECT!!":GOSUB 800:GOTO 200
1560 GOTO 1580 IF A6%*L2%=B6%*A%
1565 PRINT "NO, ";N$;" -- THAT'S NOT EQUIVALENT TO":
	PRINT TAB(25%);"WHAT YOU HAD BEFORE!!":GOTO 1590
1580 PRINT "SORRY, ";N$;" -- THAT'S NOT COMPLETELY REDUCED!!":IF A6%<A5% THEN A5%=A6%:B5%=B6%
1590 GOTO 1360 IF E%<2%:PRINT:PRINT "TRY AGAIN !! [";FNN$(A5%);"/";FNN$(B5%);"]":PRINT:PRINT:E%=E%-1%:GOTO 1505
1600 DEF FNC%(V%,V1%)
1610 E9%=1%:D5%=0%
1625 D5%=D5%+2%:D5%=3% IF D5%=4%:IF D5%>V% OR D5%>V1% THEN FNC%=E9%:GOTO 1640
1630 IF V%/D5%*D5%=V% AND V1%/D5%*D5%=V1% THEN E9%=E9%*D5%:V%=V%/D5%:V1%=V1%/D5%:GOTO 1630
1635 V%=FNQ%(V%,D5%):V1%=FNQ%(V1%,D5%):GOTO 1625
1640 FNEND
1660 DEF FNQ%(V2%,V3%)
1665 IF V2%/V3%=V3%=V2% THEN V2%=V2%/V3%:GOTO 1665
1670 FNQ%=V2%
1675 FNEND
1700 PRINT "WRONG!!":GOTO 1710 IF E%<3%:E%=E%-1%:
	GOTO 1465
1710 N1%=L2%/B3%*A%:N2%=L2%/B2%*A2%:PRINT:PRINT "LET ME SHOW YOU!!":PRINT:PRINT FNN$(N1%);TAB(6%);S$(S%);TAB(12%);FNN$(N2%)
1720 PRINT "-";FOR K%=1% TO 12%+LEN(FNN$(N2%)):PRINT:PRINT TAB(6%);FNN$(L2%):PRINT:PRINT:GOTO 1489
29000 GOTO 29100 IF M3%=Z3%:M4$=M3$(M3%):M3%=M3%+1%:RETURN
29100 M3%=0%:V9$=SYS(CHR$(4%)):GET #1%:Z3%=RECOUNT:GOTO 29000
32000 PRINT:PRINT "ADDING FRACTIONS WITH UNCOMMON DENOMINATOR":F3%=1%
32005 U$="\    \ - ## OUT OF ## ---> ###%":V9$=SYS(CHR$(2%))
	UNLESS F3%=0%
32007 PRINT:PRINT N$;" -- HERE ARE YOUR SCORES:":PRINT
32010 FOR K%=1% TO 3%:GOTO 32100 IF X%(K%+3%)=0%:PRINTUSING U$,
	B$(K%),X%(K%),X%(K%+3%),100%*X%(K%)/X%(K%+3%)
32100 NEXT K%
32220 B%=0%:B%=B%+X%(K%) FOR K%=4% TO 6%:A%=0%:A%=A%+X%(K%) 
       FOR K%=1% TO 3%:A%=100%*A%/B%
32225 IF F3%=0% THEN PRINT:PRINT "CUMULATIVE-->";A%:PRINT:RETURN
32230 B%=0%:B%=1% IF A%>60%:B%=2% IF A%>89%:DIM Z$(2%)
32240 Z$(0%)=", YOU DEFINITELY NEED MUCH MORE"
	+ " PRACTICE!!":Z$(1%)=", YOU DID ABOUT AVERAGE"
	+ " -- BUT YOU STILL NEED MORE PRACTICE!!"
32250 Z$(2%)=" -- GREAT -- YOU SEEM TO UNDERSTAND"
	+ " THESE PROBLEMS VERY WELL!!"
32260 A$=NUM$(A%):PRINT:PRINT "YOUR CUMULATIVE SCORE IS";
       LEFT(A$,LEN(A$)-1%);"%.":PRINT
32270 PRINT N$+Z$(B%):PRINT
32767 END