Programming Forums > Application Development > Visual Basic

brokenhope · Sep 1st, 2005, 5:01 PM

Alright usually I wouldnt get involved in visual basic 6, im more intrested in C++, but this is the only computer class my school has so I took it, im way ahead of the class because I know a bunch of this stuff already. Anyways Im working on a little project for fun, and part of it is a dynamic calculator

so you can have equations entered like 4 * (4+3) * rand(4,6) + (3 + (4-5)) - 2(3)

and of couse it would all go long with the order of operations... anyone have any idea how to write a command sub that could solve something like that? ps - rand is rand(min, max) it finds a number in between or equal to the ones given... if you can just give me an idea of where to start thatd be great.

bl00dninja · Sep 6th, 2005, 2:00 AM

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Label1.Caption = 4 * (4 + 3) * (Int(10 * Rnd())) + (3 + (4 - 5)) - 2 * (3)

i made a form with a label called label1 and made the caption property equal to the expression you gave with ONE difference...

well two... i made the last operation 2*(3) instead of 2(3)

i don't know rand but i know Rnd

Int(10*Rnd()) gives a random number between 0 and 9. the answer was 192

and don't use quotes around the expression or it'll evaluate it as a character string and you'll just get back what you already typed in.

Ooble · Sep 6th, 2005, 12:26 PM

I think what he wants is for the user to be able to type the equation in. Googling found this:

http://www.developerfusion.co.uk/show/198/

brokenhope · Sep 6th, 2005, 6:46 PM

Yes that was exactly what I was looking for, thank you.

brokenhope · Sep 6th, 2005, 8:25 PM

I didnt know I had to download an .OSX to get it to work, so I spoke to soon. I cant find the OSX file mentioned anywhere, ive looked all over msdn, where they said it was, I went to google and searched Visual Basic Eval, and the closest thing I found was someones self programmed version of it, but it was only a demo so I couldnt use it... anyone know where its at? or anything?

ViOLATiON · Sep 7th, 2005, 7:11 AM

Quote:

To download this OCX, visit http://msdn.microsoft.com/scripting/
Select the Script Control link, then follow the Download
instructions. The following code shows the simple VB we added
to a command button's click event. The SC1 script control
evaluates a mathematical formula in the txtFormula textbox.

I guess you had trouble with the instructions, so here's a direct link:
http://www.microsoft.com/downloads/d...displaylang=en

Rory · Sep 7th, 2005, 2:32 PM

Quote:

Originally Posted by ViOLATiON

I guess you had trouble with the instructions, so here's a direct link:
http://www.microsoft.com/downloads/d...displaylang=en

Gentoo has problems with genuine winblows evaluation, yes.

Embed a web control and navigate to the google calculator!

Or better still use the web control to expose the Javascript eval(); function.

Sep 1st, 2005, 5:01 PM	#1
brokenhope Hobbyist Programmer Join Date: Apr 2005 Posts: 126 Rep Power: 4	Question Alright usually I wouldnt get involved in visual basic 6, im more intrested in C++, but this is the only computer class my school has so I took it, im way ahead of the class because I know a bunch of this stuff already. Anyways Im working on a little project for fun, and part of it is a dynamic calculator so you can have equations entered like 4 * (4+3) * rand(4,6) + (3 + (4-5)) - 2(3) and of couse it would all go long with the order of operations... anyone have any idea how to write a command sub that could solve something like that? ps - rand is rand(min, max) it finds a number in between or equal to the ones given... if you can just give me an idea of where to start thatd be great.

Sep 6th, 2005, 2:00 AM	#2
bl00dninja Programming Guru Join Date: Oct 2004 Location: namespace std Posts: 1,246 Rep Power: 5	(Toggle Plain Text) Label1.Caption = 4 * (4 + 3) * (Int(10 * Rnd())) + (3 + (4 - 5)) - 2 * (3) Label1.Caption = 4 * (4 + 3) * (Int(10 * Rnd())) + (3 + (4 - 5)) - 2 * (3) i made a form with a label called label1 and made the caption property equal to the expression you gave with ONE difference... well two... i made the last operation 2(3) instead of 2(3) i don't know rand but i know Rnd Int(10Rnd()) gives a random number between 0 and 9. the answer was 192 and don't use quotes around the expression or it'll evaluate it as a character string and you'll just get back what you already typed in. __________________ i put on my robe and wizard hat... Have you ever heard of Plato, Aristotle, Socrates?...Morons.

Sep 6th, 2005, 12:26 PM	#3
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	I think what he wants is for the user to be able to type the equation in. Googling found this: http://www.developerfusion.co.uk/show/198/ __________________ Me :: You :: Them

Sep 6th, 2005, 8:25 PM	#5
brokenhope Hobbyist Programmer Join Date: Apr 2005 Posts: 126 Rep Power: 4	... I didnt know I had to download an .OSX to get it to work, so I spoke to soon. I cant find the OSX file mentioned anywhere, ive looked all over msdn, where they said it was, I went to google and searched Visual Basic Eval, and the closest thing I found was someones self programmed version of it, but it was only a demo so I couldnt use it... anyone know where its at? or anything?

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Sep 6th, 2005, 6:46 PM	#4
brokenhope Hobbyist Programmer Join Date: Apr 2005 Posts: 126 Rep Power: 4	Yes that was exactly what I was looking for, thank you.

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Programming Forums > Application Development > Visual Basic

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