I am working on a program and need to implement a double-entry accounting system. It would seem to me that there should be some open source project or code base out there already with most all of the basic accounting functions already written, but Google didn't turn anything up.
I don't want to re-invent the wheel, so is anyone aware if there is already a package out there that implements double-entry accounting in C, C++, or Objective-C?
Thank you!
(Frank)
Note: I am looking for a double-entry module to plug in to my existing application (it is a property management system) and I'm not re-writing a package like GNUCash. Sorry if I didn't state that clearly.
GnuCash - http://www.gnucash.org/
GnuCash is open source and I believe large parts of the backend are in C
Ledger - http://ledger-cli.org/
It's a pure C++ command-line engine for double-entry accounting. It follows the Unix philosophy so you don't actually even need to delve into the code--just parse the plain text output.
Related
I have found how one can write an odf file, but did not found any natively supported by Qt methods that allow to read. Is it possible at all? A small example will be useful.
While you are told you cannot use external libraries, this is something that various companies (Nokia and SKF for example) are successfully using the Callibra engine to do. They are based on Qt, so may perhaps be an option for you. www.calligra.org has a good few bits of information on it :)
There isn't anything in Qt for this.
If you need to manipulate office documents from an application, you could look at using OpenOffice / LibreOffice in server mode controlled via the UNO bridge system. See the OpenOffice.org Developer's Guide for details. Note: this is not trivial to get working correctly.
For as far as I'm aware, this functionality does not exist natively within Qt. There have been requests in the past and there has been mention of ongoing work to read ODF back in 2008, but nothing has been done with this so far to my knowledge.
Perhaps, based on the sources of QTextDocumentWriter for the ODF format, you could fashion your own solution. But I'm not sure how feasible this is. Looking at the sources of QTextOdfWriter, it seems doable, but just a lot of work.
I am trying to get started with HTK, I grabbed a copy, compiled it, grabbed the book, and all went more or less fine, little troubles here and there but nothing serious.
Now after reading the book and googling quite a while, I do not see any documentation for the essential part for me: HTKLib. Everything is described into the smallest detail for all HTK tool programs (scriptable command line interface tools) but I cannot find a single example or tutorial how to actually call the lib.
Could anyone point me into a direction?
The source code for the respective tools is included, but it would be rather cumbersome to have to extract the information for a reputable library by reading the source code... I would have expected a little more documentation , but maybe I simply overlooked it?
Any help is deeply appreciated,
Tom
edit:
I was trying to use HTK for computer vision purposes, not for NLP, and for that I required that I could link against it, and call it from within my code. Thanks for your replies.
Maybe ATK is more suitable for you. Here is the explantation from the ATK site:
"ATK is an API designed to facilitate building experimental applications for HTK. It consists of a C++ layer sitting on top of the standard HTK libraries."
In addition Microsoft Research has another research tool here for training acoustic models. This includes a set visual project for HTKlib and a set of C++ HTK wrappers, but it may only include a subset of the HTK functionality and has licence restrictions.
I have not used it but use I the language modeling toolkit. I think the main intention is to use the command line tools provided. I imagine they are very flexible tools that will enable you to build and test models. Why do you want to use the code?
Also what are you trying to do?
I'm working on an application using OpenGL and C++ that parses some structured input from a file and displays it graphically. I'd like to start an Open File dialog when the application loads to allow the user to choose the file they want to have displayed. I haven't been able to find what I need on the web. Is there a way to achieve this in C++? If so, how? Thank you in advance.
You have two choices, a quick one, and a good one:
Quick and pretty simple, use the Navigation Services framework from Carbon and NavCreateGetFileDialog(). You'll be done quick, and you'll have to learn almost nothing new, but your code won't run in 64-bit (which Apple is pushing everyone towards) and you'll have to link the Carbon framework. Navigation Services is officially removed in 64-bit, and is generally deprecated going forward (though I expect it to linger in 32-bit for quite a while).
A little more work the first time you do it (because you need to learn some Objective-C), but much more powerful and fully supported, wrap up NSOpenPanel in an Objective-C++ class and expose that to your C++. This is my Wrapping C++ pattern, just backwards. If you go this way and have trouble, drop a note and I'll try to speed up posting a blog entry on it.
To add to what Rob wrote:
Unfortunately, there's no simple equivalent to Windows's GetOpenFileName.
If you use Carbon: I don't really think NavCreatGetFileDialog is easy to use... you can use this code in the CarbonDev to see how to use it. The code there returns CFURLRef. To get the POSIX path, use CFURLGetFileSystemReprestnation.
That said, I recommend you to use Cocoa. Rob will write a blog post how to use NSOpenPanel from GLUT :)
I have a few years experience programming c++ and a little less then that using Qt. I built a data mining software using Qt and I want to make it available online. Unfortunately, I know close to nothing about web programming. Firstly, how easy or hard is this to do and what is the best way to go about it?
Supposing I am looking to hire someone to make me a secure, long-term, extensible, website for an online software service, what skill set should I be looking for?
Edit:
I want to make my question a little more specific:
How can I take a bunch of working c++ functions and port the code so I can run it server side on a website?
Once this is done, would it be easy to make changes to the c++ code and have the algorithm automatically update on the site?
What technologies would be involved? Are there any cloud computing platforms that would be good for something like this?
#Niklaos-what does it mean to build a library and how does one do that?
You might want to have a look at Wt[1]. Its a C++ web framework which is programmed more or less like a desktop GUI application. One of the use cases quoted is to bring legacy apps into the web.
[1] http://www.webtoolkit.eu
Port the functions to Java, easily done from C++, you can even find some tools to help - don't trust them implicitly but they could provide a boost.
See longer answer below.
Wrap them in a web application, and deploy them on Google App-Engine.
Java version of a library would be a jar file.
If you really want to be able to update the algorithm implementation dynamically, then you could implement them in Groovy, and upload changes through a form on your webapp, either as files or as a big text block, need to consider version control.
The effort/skillset involved to perform the task depends on how your wrote your code. If it is in a self-contained library, and has a clean (re-entrant, thread safe) API, you could probably hire a web developer (html/php/asp etc) to write the UI interface to the library for a relatively small cost. The skills required would be dependant on the technologies you wanted to use. For Windows development I would suggest C#/ASP. The applicant would require knowledge of interfacing with native libraries from a managed language. This is assuming that you dont mind the costs of Windows deployment for your application.
On the otherhand, if the library is complex or needs to be re-written to support the extensibility you are looking for, asking here will not get you much.
BTW: here is a great article on Marshalling if you chose to implement using C#/ASP
http://msdn.microsoft.com/en-us/magazine/cc164193.aspx
First, DO NOT USE PHP :D
I used it for some projects (the last one with symphony framework) and i almost shoot my self !
If you are very familiar with C++, ASP .NET could be a good solution because if you like C++ you are going to love C#.
Any ways, I personally use Ruby on Rails for 6 months now and I LOVE IT. I won't write you a book here but the framework is pure gold !
The only problem is that Ruby is a very special language. You will probably be a bit lost a the beginning. But as every one you will learn to love it.
But that was only for the server side. Indeed, there 3 technologies you won't be able to avoid if you want to start to develop web applications.
HTML, CSS and JavaScript are presents every where. This is why i'm thinking you should start by HTML and CSS then JavaScript (with jQuery).
When you've got some basics with these 3 technologies you should be able to choose the server side language.
But you've got to tell you one thing, it's not going to be easy !
PS : Ruby on Rails uses HAML and SASS. These 2 languages replaces HTML and CSS you should have a look at them quickly because they are awesome.
We are developing a rather large project in C++, where many components require configuration parameters. We would like to use a central place to configure everything (like a registry), preferably with a nice and simple GUI (e.g. like Firefox's about:config) and a simple API.
I am pretty sure this that many applications have this kind of problem, but could not find any libraries available that can be readily used for this. Does anyone know of a good (preferably free) library to use for this?
This should work cross platform in Windows and Linux.
boost::program_options provides unified (and cross platform) support for configuration from command line, environment variables and configuration files. It seems like it ought to scale to multiple bits of a large software system registering an interest in various parameters (e.g option groups). Not much help with the GUI or persistence side of things though (but then what's wrong with editing a config file with a text editor ?).
I've used libconfig before, works well easy and LGPL.
http://www.hyperrealm.com/libconfig/
I've used a modified version of John Torjo code from TechRepublic/DDJ (source)
The multi platform ACE library has a configuration class that uses config files that have the Windows .ini format.
I've often used a simple wrapper around pugxml. I find that creating a configuration class with parameter validation for enumerated types and so on makes the rest of the code much cleaner. If you are just dealing with key/value pairs you will have to validate the data all throughout your code. By writing a custom class for each application you can put all that in one place.
Try Configurator. There is no GUI, but it's easy-to-use and flexible C++ library for configuration file parsing (from simplest INI to complex files with arbitrary nesting and semantic checking). Header-only and cross-platform. Uses Boost C++ libraries.
See: http://opensource.dshevchenko.biz/configurator