Source code in the commodore programming language

10 print chr$(147);chr$(14)
20 dim s$(11),ts$(11),t$(11),o$(11):co=39
30 for i=0 to 11:read s$(i),ts$(i),t$(i),o$(i):next
40 print "Enter a number";:input n$
45 ou$=""
50 if len(n$)>36 then print:print "Too long.":print:goto 40
51 print
55 rem check for negative
56 if left$(n$,1)="-" then n$=right$(n$,len(n$)-1):ou$="negative ":gosub 500
60 no=int((len(n$)-1)/3)
70 rem pad left side
71 p=(no+1)*3-len(n$)
75 if p>0 then n$="0"+n$:p=p-1:goto 75
77 if val(n$)=0 then ou$=s$(0):gosub 500:goto 125
80 rem calculate left to right
81 for i=no to 0 step -1:oi=no-i
85 ch$=mid$(n$,1+(oi*3),3)
90 h=val(mid$(ch$,1,1)):t=val(mid$(ch$,2,1)):s=val(mid$(ch$,3,1))
93 if h=0 and t=0 and s=0 then goto 120
95 if h>0 then ou$=s$(h)+" hundred ":gosub 500
100 if t>1 then ou$=t$(t)+mid$("- ",abs(s=0)+1,1):gosub 500
105 if t=1 then ou$=ts$(s)+" ":gosub 500
110 if t<>1 and s>0 then ou$=s$(s)+" ":gosub 500
115 ou$=o$(i)+" ":gosub 500
120 next i
125 print:print
130 print "Another? (y/n) ";
140 get k$:ifk$<>"y" and k$<>"n" then 140
145 print k$
150 if k$="y" then print:goto 40
200 end
500 rem print with word wrapping
505 cp=pos(0):nl=len(ou$)
510 if cp>co-nl then print
520 print ou$;
599 return
1000 data zero,ten,"",""
1001 data one,eleven,ten,thousand
1002 data two,twelve,twenty,million
1003 data three,thirteen,thirty,billion
1004 data four,fourteen,forty,trillion
1005 data five,fifteen,fifty,quadrillion
1006 data six,sixteen,sixty,quintillion
1007 data seven,seventeen,seventy,sextillion
1008 data eight,eighteen,eighty,septillion
1009 data nine,nineteen,ninety,octillion
1010 data "","","",nonillion
1011 data "","","",decillion