| 10 |
| 20 |
| 100 |
| 110 DATA "+", 2, "-", 3, "*", 4, "/", 5, "p", 6, "d", 7, "q", 8 |
| 111 DATA "sqr", 9, "dup", 10, "swap", 11, "", 12, "", 13, "", 14, "", 15, "", 16 |
| 120 |
| 130 S=0 |
| 140 N=16 |
| 150 DIM S(N) |
| 160 |
| 170 E=0 |
| 200 |
| 210 PRINT "<";S;">:"; :INPUT A$ |
| 220 @S=0 |
| 230 A=VAL(A$) |
| 240 IF @S=0 THEN T=1 : GOTO 500 |
| 300 T=-1 |
| 310 RESTORE |
| 330 @S=0 |
| 340 FOR I |
| 350 READ K$ |
| 360 READ X |
| 370 IF K$=A$ THEN T=X : BREAK |
| 380 IF @S<>0 THEN BREAK |
| 390 NEXT |
| 400 IF T=-1 THEN E=1 |
| 500 |
| 505 |
| 510 IF T>0 GOSUB 900+100*T |
| 600 IF E<>0 THEN PRINT "Error" : E=0 : GOTO 200 |
| 610 IF S>0 THEN PRINT S(S) |
| 620 GOTO 200 |
| 1000 |
| 1010 IF S=N THEN E=0: RETURN |
| 1020 S=S+1 : S(S)=A |
| 1030 RETURN |
| 1100 |
| 1110 IF S<2 THEN E=1: RETURN |
| 1120 S(S-1)=S(S-1)+S(S) |
| 1130 S=S-1 |
| 1140 RETURN |
| 1200 |
| 1210 IF S<2 THEN E=1: RETURN |
| 1220 S(S-1)=S(S-1)-S(S) |
| 1230 S=S-1 |
| 1240 RETURN |
| 1300 |
| 1310 IF S<2 THEN E=1: RETURN |
| 1320 S(S-1)=S(S-1)*S(S) |
| 1330 S=S-1 |
| 1340 RETURN |
| 1400 |
| 1410 IF S<2 OR S(S)=0 THEN E=1: RETURN |
| 1420 S(S-1)=S(S-1)/S(S) |
| 1430 S=S-1 |
| 1440 RETURN |
| 1500 |
| 1510 IF S=0 THEN E=1 |
| 1530 RETURN |
| 1600 |
| 1610 IF S=0 THEN E=1 ELSE S=S-1 |
| 1620 RETURN |
| 1700 |
| 1710 END |
| 1800 |
| 1810 IF S(S)<0 OR S=0 THEN E=1 ELSE S(S)=SQR(S(S)) |
| 1820 RETURN |
| 1900 |
| 1910 IF S>N-1 OR S=0 THEN E=1 ELSE S=S+1: S(S)=S(S-1) |
| 1920 RETURN |
| 2000 |
| 2010 IF S=N OR S<2 THEN E=1 ELSE A=S(S) : S(S)=S(S-1) : S(S-1)=A |
| 2020 RETURN |
| 2100 |
| 2120 RETURN |
| 2200 |
| 2220 RETURN |
| 2300 |
| 2320 RETURN |
| 2400 |
| 2420 RETURN |
| 2500 |
| 2520 RETURN |
|
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