I have been learning c++ for less than a day now, and have made a simple command line calculator for windows.

Why do that when windows has one already with a GUI you may ask, well I done it to learn.

So far it only has addidition, subtraction, multiplication and division. I Might add more functions when I get better at c++ but I would also have to learn more math to make more complex funtions.

Every line is commented, and you can get the .exe at:

And here is the source for people who wanna see it, or compile it themselves. Please note, its my first c++ program, so the code looks bad :P.
That [code] looks a lot different than a cmd line calculator I would made :D

Not syaing that's a BAD thing, it's just different.

I have done a little update to the simple command line calcultor. They have mainly been to the source.

Executable here

Source here
In response to Smoko
Wow, that is simple...
Anywho, not bad, a few hours worth of work at best, but you have to learn somewhere.
Hey hey hey, I remembered this topic and I whipped up my own calculator...

Please note this is the first time I've used header files so I didn't know if I should use prototypes.

Please tell me what I've done wrong [As in "bad methods" I may have utilized] so I can fix it! :)

Please note that the download link will only remain active for about 30-days... within that time the file may be reported as missing or non-existent: Sorry! Uploadtemple is really bad about uptime, but it's also really FREE =D

Well any ways, I thought it was interesting how his source and mine look totally different, any hoo.... enjoy =P


Download the source code here, or the binary executable here.

(These links may or might not be blocked by pop-up blockers - FireFox/Mozilla users try middle clicking the links to open them on a new tab - Internet Explorer users try copying the URL and pasting it into your address bar)

Hmm, hey also, why is his executable like 300 kb less than mine? Jeez Dev-Cpp seems to put out some bloated executables :O Or maybe it's something I did... is it because I included cstdlib?

I'm dying to know why mine is so much bigger than his :)

Thanks all,

In response to Smoko
Look up switch statements, and use one of those instead of all the if statements. It will be bit more structured that way.

Prodigal Squirrel
In response to Kujila
I think yours is just bigger because of the compiler. Anyhow, I do believe that's it's not considered good practice to implement functions in a header. You can prototype them there, however. I'm not completely sure on that however, I think that may only apply to a classes functions when a class is defined in a header.

Prodigal Squirrel.

One last note. DaniWeb forums. That place has a pretty good C/C++ forum. Check it out.
In response to Kujila
I use Dev C++ aswell.

Your source looks weird aswell. :P

Whats exponent mean? I kinda suck at math. That's why Im making a calculator, so I can make my self learn more :P
In response to Smoko
Exponent is another word for power, or index. In other words, it's the 3 in x3.
In response to Prodigal Squirrel
Alright, thanks... Please note though that Smoko says he uses Dev-Cpp (Dev-C++) as well, so I don't think it's the compiler then.

Anyhoot, I thought it would be good to put them in a header so it's independent from the code =) Sort of like what a CSS file is to HTML... change that and it applies to everything else. That way I wouldn't have to Copy-and-Paste the function into each [if I had multiple] cpp files.

I'll check out the DaniWeb forums for more info thanks ;)

In response to Smoko
Woops; I'm getting not found errors on these links now as well =(

"We are sorry, this page was not found. FreeWebs offers free websites and web hosting to millions of web users."

Could you re-upload them again or upload them to somewhere like uploadtemple or

We must keep our awesome calculators alive! Aliiiive!

In response to Kujila
I deleted it from the server, I was gunna uplaod the latest version, but never got around to it.

Here they are now though:
In response to Smoko
Heh, your calculator has grown filesize-wise to about the same as mine =)


That seems a bit excessive IMHO... I wonder why our programs are so chunky :x

In response to Kujila
Well, I have redone the way the problems are solved, another function or two and some more command checking.

So, That explains why mine is that size.
In response to Kujila
Check that your compiler doesn't have a bunch of debug options set. I tested both source codes in VC++ and they both compile to around 100KB.
In response to Prodigal Squirrel
Yeah, I know it is good practice to include your self-defined classes in a header but it would probably get to be too much of a headache to include every single function prototype and/or function in seperate header files.
In response to SSJ2GohanDBGT
it would probably get to be too much of a headache to include every single function prototype and/or function in seperate header files.

That's what most C++ projects do. It avoids linking headaches and provides some handy self-documentation in case you need to double-check what arguments a function accepts.

And believe me, linking headaches are much more annoying than having-to-copy-and-paste headaches. =)
In response to Crispy
Crispy wrote:
And believe me, linking headaches are much more annoying than having-to-copy-and-paste headaches. =)

Most definetly. I've had some weird problems with linker errors. Twice has a program I've made generated a liner error that would NOT go away. And both times, I had to create a new project file, and copy and past every file. Then it would work. I still don't understand why it would do that. I never changed anything with my program, but it would work when I did that. Weird, I say.

Prodigal Squirrel