Re: TIB: String Arrays, GOSUB

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Re: TIB: String Arrays, GOSUB

If you think about it, strings are really just arrays of characters. For
instance, If you look at them like lists, you can represent them
numerically as a position in a predefined character set string. Like....

---------------------------------------------------
" ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxy1234567890"->abet
{5,40}->dim strarray
For(z,1,5)
InpStr "enter a string:",S
Disp "Encoding..."
If lngth S>40
sub(S,1,40)->S
For(x,1,40-lngth S)
S+" "->S
For(Y,1,40)
For(x,1,lngth abet)
If sub(abet,x,1)=sub(S,Y,1)
strarray(z,Y)=x
End
End
End
---------------------------------------------------

This prompts for 5 strings, encodes them into the matrix strarray, and
quits. This does take a bit, though, and the strings are a fixed length
(40 in this example, but can be shrunk or expanded as needed). The
encoding does take a bit, though. Now, to extract this info...

---------------------------------------------------

For(z,1,5)
" "->S
For(x,1,40)
S+sub(abet,strarray(z,x))->S
End
sub(S,2,40)->S
Disp S
End

---------------------------------------------------

This decoding takes each string out of strarray, assembles it into the
string S, and displays it. Again, it assumes 

+---------------------------------------------+
|There's too much blood in my caffeine system.|
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+---------------------------------------------+

On Tue, 21 Oct 1997 15:44:04 -0700 Peter Sahlstrom
<petes@technologist.com> writes:
>This is a multi-part message in MIME format.
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>I originally learned basic using GW-BASIC in about 1988, and I've
>noticed two major things TI-BASIC appears to be missing:
>
>   * String Arrays-for instance, A$(1)="A", A$(2)="B", A$(3)="C", etc.
>     Is there a way to simulate these in TI-BASIC?
>   * GOSUB & Subroutines-for instance:
>          10 PRINT "Hello";
>          20 GOSUB 50
>          30 PRINT "Goodbye";
>          40 GOSUB 50:END
>          50 FOR I=1 TO 5
>          60 PRINT ".";
>          70 FOR J=1 TO 1000
>          80 NEXT J
>          90 NEXT I
>          100 RETURN
>
>     I know it's possible to do something similar to what is done in
>     lines 20 & 40 by calling another program, and having the called
>     program have a RETURN statement at the end, but it would simplify
>     my programming greatly if I was able to do in-program subroutine
>     calls.
>
>Thanks for your help everybody!
>
>--
>Peter Sahlstrom
>petes@technologist.com/petersahlstrom@geocities.com
>http://www.geocities.com/SiliconValley/Lakes/1950 (Homepage)
>
>
>--------------395B062970B41D6C72465657
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><HTML>
>I originally learned basic using GW-BASIC in about 1988, and I've 
>noticed
>two major things TI-BASIC appears to be missing:
><UL>
><LI>
><FONT COLOR="#FF6666">String Arrays</FONT>-for instance, A$(1)="A", 
>A$(2)="B",
>A$(3)="C", etc.&nbsp; Is there a way to simulate these in 
>TI-BASIC?</LI>
>
><LI>
><FONT COLOR="#FF6666">GOSUB &amp; Subroutines</FONT>-for 
>instance:</LI>
>
><UL>10 PRINT "Hello";
><BR>20 <FONT COLOR="#FF6666">GOSUB 50</FONT>
><BR>30 PRINT "Goodbye";
><BR>40 <FONT COLOR="#FF6666">GOSUB 50</FONT>:END
><BR>50 FOR I=1 TO 5
><BR>60 PRINT ".";
><BR>70 FOR J=1 TO 1000
><BR>80 NEXT J
><BR>90 NEXT I
><BR>100 RETURN</UL>
>
>
><P>I know it's possible to do something similar to what is done in 
>lines
>20 &amp; 40 by calling another program, and having the called program 
>have
>a RETURN statement at the end, but it would simplify my programming 
>greatly
>if I was able to do in-program subroutine calls.</UL>
>Thanks for your help everybody!
>
><P>--
><BR>Peter Sahlstrom
><BR>petes@technologist.com/petersahlstrom@geocities.com
><BR><A 
>HREF="http://www.geocities.com/SiliconValley/Lakes/1950">http://www.geocities.com/SiliconValley/Lakes/1950</A>

>(Homepage)
><BR>&nbsp;</HTML>
>
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>fn:             Peter Sahlstrom
>n:              Sahlstrom;Peter
>email;internet: petes@technologist.com
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References: