5 ONERRORGOTO2000:DEFSEG=0
10 CLS:MODE8:DIM:ERASEa,b,d:DIMa(1,1),b(1,1),d(1,1):m=1:n=1:o=1:p=1:q=1:r=1:c$=CHR$(5):e=1
40 GOSUB460:GOSUB470:GOSUB420
50 LOCATE0,0:PRINTc$;"Matrix  A";m$;":B";n$;
60 LOCATE28,1:z=ASC(INPUT$(1)):IFz>96 THENz=z-32
100 ONz-41 GOTO1250,1300,,1350,1500,,,,,,,,,,,,,,,,,,,120,130,700,800,,,,,800,,1400,1100,1150,,,300,,,,1200
110 GOTO60
120 x=m:GOTO500
130 x=o:GOTO600
300 LOCATE0,0:FORi=0 TOm:FORj=0 TOn:z=a(i,j):IFz<>0 ANDABSz>=1e-90 THENz=ROUND(z,LOG(ABSz)-7)
310 IFz<>0 ANDABSz<1e-90 THENz=z*1e10:z=ROUND(z,LOG(ABSz)-7):z=z/1e10
320 PRINTc$;"a(";MID$(STR$(i+1),2);",";MID$(STR$(j+1),2);") =";z;
330 z=ASC(INPUT$(1,@)):IFz=28 ORz=29 THEN50
340 IFz>96 THENz=z-32
350 ONz-41 GOTO1250,1300,,1350,1500,,,,,,,,,,,,,,,,,,,120,130,700,800,,,,,800,,1400,1100,1150,,,300,,,,1200
360 IFz<>13 ANDz<>31 ANDz<>30 THEN330
370 IF(z=31 ANDi+j=n+m) OR(z=30 ANDi+j=0) THEN330
390 IFz=30 THENIFj=0 THENi=i-1:j=n-1 ELSEj=j-2
400 NEXT:NEXT:GOTO50
420 CLS:PRINT:PRINT">A,B,D,I,T,K,+,-,*,M,L,C,P ?";:RETURN
440 FORi=0 TOm:FORj=0 TOn:a(i,j)=c(i,j):NEXT:NEXT:RETURN
460 n$="("+MID$(STR$(o+1),2)+","+MID$(STR$(p+1),2)+")":RETURN
470 m$="("+MID$(STR$(m+1),2)+","+MID$(STR$(n+1),2)+")":RETURN
480 m$="("+MID$(STR$(i+1),2)+","+MID$(STR$(j+1),2)+")":RETURN
500 i=x:j=n:GOSUB480:p$="A(m,n) = A"+m$:s$="m":z=x+1:GOSUB1900:IFw THEN40 ELSEx=z-1
510 i=x:j=n:GOSUB480:p$="A(m,n) = A"+m$:s$="n":z=n+1:GOSUB1900:IFw THEN500
520 m=x:n=z-1
530 DIMa(m,n)
540 FORi=0 TOm:FORj=0 TOn
550 p$="a("+MID$(STR$(i+1),2)+","+MID$(STR$(j+1),2)+")"
560 z=a(i,j):GOSUB1850:IFw=13 THENa(i,j)=z:GOTO580
570 IFj=0 THENIFi=0 THEN510 ELSEi=i-1:j=n-1 ELSEj=j-2
580 NEXT:NEXT:GOTO40
600 i=x:j=p:GOSUB480:p$="B(m,n) = B"+m$:s$="m":z=x+1:GOSUB1900:IFw THEN40 ELSEx=z-1
610 i=x:j=p:GOSUB480:p$="B(m,n) = B"+m$:s$="n":z=p+1:GOSUB1900:IFw THEN600
620 o=x:p=z-1
630 DIMb(o,p)
640 FORi=0 TOo:FORj=0 TOp
650 p$="b("+MID$(STR$(i+1),2)+","+MID$(STR$(j+1),2)+")"
660 z=b(i,j):GOSUB1850:IFw=13 THENb(i,j)=z:GOTO680
670 IFj=0 THENIFi=0 THEN610 ELSEi=i-1:j=n-1 ELSEj=j-2
680 NEXT:NEXT:GOTO40
700 LOCATE0,0:PRINTc$;"Change  A";m$;"  B";n$;:IFm=o ANDn=p THEN750
710 ERASEc:DIMc(m,n):FORi=0 TOm:FORj=0 TOn:c(i,j)=a(i,j):NEXT:NEXT
720 ERASEa:DIMa(o,p):FORi=0 TOo:FORj=0 TOp:a(i,j)=b(i,j):NEXT:NEXT
730 ERASEb:DIMb(m,n):FORi=0 TOm:FORj=0 TOn:b(i,j)=c(i,j):NEXT:NEXT
740 x=m:y=n:m=o:n=p:o=x:p=y:z$=m$:m$=n$:n$=z$:GOTO50
750 FORi=0 TOm:FORj=0 TOn:w=a(i,j):a(i,j)=b(i,j):b(i,j)=w:NEXT:NEXT:GOTO50
800 LOCATE0,0:IFm<>n THENGOSUB1830:GOTO50
810 IFz=68 THENPRINTc$;"Determinant A = ....."; ELSEPRINTc$;"Inverse A  A";
820 t=1E-10:d=1
830 ERASEc,e:y=2*(m+1)-1:x=m:DIMc(x,y),e(x)
840 FORi=0 TOm:FORj=0 TOn:c(i,j)=a(i,j):NEXT:NEXT
850 FORi=0 TOm:FORj=n+1 TOy:IFi=j-n-1 THENc(i,j)=1
860 NEXT:NEXT
870 FORi=0 TOx:e(i)=i:NEXT
880 FORk=0 TOx:w=ABS(c(k,k)):a=k:b=k
890 FORi=k TOx:FORj=k TOx:IFw<ABS(c(i,j)) THENw=ABS(c(i,j)):a=i:b=j
900 NEXT:NEXT
920 IFw<t THENIFz=68 THENd=0:GOTO1000 ELSEGOSUB1830:GOTO50
940 IFk<>a THENd=-d:FORj=k TOy:w=c(k,j):c(k,j)=c(a,j):c(a,j)=w:NEXT
950 IFk<>b THENd=-d:FORi=0 TOx:w=c(i,k):c(i,k)=c(i,b):c(i,b)=w:NEXT:w=e(k):e(k)=e(b):e(b)=w
960 w=c(k,k):d=d*w:c=k+1:FORj=c TOy:c(k,j)=c(k,j)/w:NEXT
970 FORi=0 TOx:IFi<>k THENw=c(i,k):FORj=c TOy:c(i,j)=c(i,j)-w*c(k,j):NEXT
980 NEXT:NEXT
1000 IFz=68 THENPRINTc$;"Determinant A =";STR$(d);:z$=INPUT$(1,@):GOTO50
1040 w=x+1:FORj=w TOy:FORi=0 TOx:w=e(i):c(w,x)=c(i,j):NEXT
1050 FORi=0 TOx:c(i,j)=c(i,x):NEXT:NEXT
1070 FORi=0 TOx:FORj=0 TOx:a(i,j)=c(i,j+x+1):NEXT:NEXT:GOTO300
1100 m=q:n=r:GOSUB470:LOCATE0,0:PRINTc$;"Load  A  M";m$;
1110 ERASEa:DIMa(m,n):FORi=0 TOm:FORj=0 TOn:a(i,j)=d(i,j):NEXT:NEXT:GOTO50
1150 q=m:r=n:GOSUB470:LOCATE0,0:PRINTc$;"Memory  A  M";m$;
1160 ERASEd:DIMd(q,r):FORi=0 TOm:FORj=0 TOn:d(i,j)=a(i,j):NEXT:NEXT:GOTO50
1200 w=m:m=n:n=w:GOSUB470:LOCATE0,0:PRINTc$;"Transpose  A  A";m$;
1210 ERASEc:DIMc(m,n):FORi=0 TOn:FORj=0 TOm:c(j,i)=a(i,j):NEXT:NEXT
1220 ERASEa:DIMa(m,n):GOSUB440:GOTO300
1250 LOCATE0,0:IFn<>o THENGOSUB1830:GOTO50
1260 i=m:j=p:GOSUB480:PRINTc$;"A*B  A";m$;
1270 ERASEc:DIMc(m,p):FORi=0 TOm:FORj=0 TOp:w=0:FORk=0 TOn:w=w+a(i,k)*b(k,j):NEXT:c(i,j)=w:NEXT:NEXT:IFm<>o OR n<>p THENn=p:ERASEa:DIMa(m,n)
1280 GOSUB440:GOTO300
1300 LOCATE0,0:IFm<>o ORn<>p THENGOSUB1830:GOTO50
1310 PRINTc$;"A+B  A";m$;
1320 ERASEc:DIMc(m,n):FORi=0 TOm:FORj=0 TOn:c(i,j)=a(i,j)+b(i,j):NEXT:NEXT:GOSUB440:GOTO300
1350 LOCATE0,0:IFm<>o ORn<>p THENGOSUB1830:GOTO50
1360 PRINTc$;"A-B  A";m$;
1370 ERASEc:DIMc(m,n):FORi=0 TOm:FORj=0 TOn:c(i,j)=a(i,j)-b(i,j):NEXT:NEXT:GOSUB440:GOTO300
1400 p$="k*A"+m$+"  A":z=e:GOSUB1950:GOSUB420:IFw THEN50 ELSEe=z
1410 LOCATE0,0:PRINTp$;
1420 ERASEc:DIMc(m,n):FORi=0 TOm:FORj=0 TOn:c(i,j)=e*a(i,j):NEXT:NEXT:GOSUB440:GOTO300
1500 DEFCHR$(254)="0080F08000":CLS:GOSUB1600:i=2
1510 PRINT:ONi GOSUB1600,1610,1620,1630,1640,1650,1660,1670,1680,1690,1700,1710,1720
1520 z=ASC(INPUT$(1,@)):IFz=28 ORz=29 THEN1580
1530 IFz<>13 ANDz<>31 ANDz<>30 THEN1520
1540 IF(z=31 ANDi=13) OR(z=30 ANDi=1) THEN1520
1550 IFz=30 THENi=i-2
1570 i=i+1:IFi<14 THEN1510
1580 GOSUB420:GOTO50
1600 PRINT" A : input A(m,n)";:RETURN
1610 PRINT" B : input B(m,n)";:RETURN
1620 PRINT" D : determinant A";:RETURN
1630 PRINT" I : inverse         Až  A";:RETURN
1640 PRINT" T : transposition   A“  A";:RETURN
1650 PRINT" K : scalar-cal      k*A  A";:RETURN
1660 PRINT" + : addition        A+B  A";:RETURN
1670 PRINT" - : subtraction     A-B  A";:RETURN
1680 PRINT" * : multiplication  A*B  A";:RETURN
1690 PRINT" M : memory          A  M";:RETURN
1700 PRINT" L : load            A  M";:RETURN
1710 PRINT" C : change          A  B";:RETURN
1720 PRINT" P : print A(m,n)";:RETURN
1830 LOCATE0,0:PRINTc$;"not found";:z$=INPUT$(1,@):RETURN
1850 CLS:PRINTp$;" =";z;
1860 LOCATE0,1:PRINTc$;"?";:INPUT@16;z:LOCATE0,0:w=PEEK(&H65B):RETURN
1900 CLS:PRINTp$;
1910 LOCATE0,1:PRINTc$;s$;" ?";:INPUT@3;z:LOCATE0,0:w=PEEK(&H65B)-13:IFw THENRETURN
1920 IFz<1 ORz>10 ORFRAC(z)<>0 THEN1910 ELSERETURN
1950 CLS:PRINTp$;
1960 LOCATE0,1:PRINTc$;"k=";z;"?";:INPUT@12;z:LOCATE0,0:w=PEEK(&H65B)-13:RETURN
2000 IFERR=1 THENCLS:ONERRORGOTO0
2010 IFERL=1860 THENRESUME1860
2020 IFERL=1910 THENRESUME1910
2030 IFERL=1960 THENRESUME1960
2040 IFERL=530 THENERASEa:RESUME530
2050 IFERL=630 THENERASEb:RESUME630
2080 GOSUB1830:RESUME40