Dwedit's Board

Vash The Stampede

Member

From: Philadelphia Area

Registered: 2004-12-16

Posts: 253

Website

Basic Programming

Basic as in simple.  I'm trying to create an IF statement and having a lot of trouble.  I want it to be IF 1<B<5, but it won't let me have the two signs.  Also, how can I have it so only integers are allowed to be entered into prompts and inputs?

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Quietust

Member

Registered: 2004-12-13

Posts: 91

Re: Basic Programming

1. IF 1<B AND B<5

2. Depends on the calculator. On the 85, you can't force it to accept only integers (you either tell it to accept numbers or strings; for the former, it'll evaluate it as an expression and 'crash' if you give it a bad input), though the later calculators probably allow you to be more strict.

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* Quietust, QMT Productions
P.S. If you don't get this note, let me know and I'll write you another.

leofox

Member

From: Balmora

Registered: 2004-12-23

Posts: 262

Re: Basic Programming

Also, how can I have it so only integers are allowed to be entered into prompts and inputs?

Repeat X=int(X
Prompt X
End

This will keep on doing prompt until X is integer. You can add stuff like a message to tell you to only add integers if a non integer value is inputted, or ClrHome to clear the screen every time it asks again (so your screen doesnt get flooded with 'X?')

Quietust

Member

Registered: 2004-12-13

Posts: 91

Re: Basic Programming

On the older calculators (85, 86), you can't reference undefined variables, so you need to resort to something like this:

Prompt X

While X≠int(X
Prompt X
End

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* Quietust, QMT Productions
P.S. If you don't get this note, let me know and I'll write you another.

leofox

Member

From: Balmora

Registered: 2004-12-23

Posts: 262

Re: Basic Programming

nah, you can always use 0->X before doing the repeat loop, to define that variable.

Quietust

Member

Registered: 2004-12-13

Posts: 91

Re: Basic Programming

In that case, 0.1->X would work a bit better, but the overall effect is the same (though it'd take a few more bytes of code).

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* Quietust, QMT Productions
P.S. If you don't get this note, let me know and I'll write you another.

leofox

Member

From: Balmora

Registered: 2004-12-23

Posts: 262

Re: Basic Programming

if you use Repeat it'll run at least once anyway. Repeat only checks at the end of the loop, so by then X will already exist.

Vash The Stampede

Member

From: Philadelphia Area

Registered: 2004-12-16

Posts: 253

Website

Re: Basic Programming

I have an 83+ and I'm just finding something to do during math class.  I'll definitely try these after I'm tired of my PSP.

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http://forums.reg-exp.org

It's a small, fun forum.  If you'd like an invite, e-mail me.