Convert GUI C++ app to a console one

Question

I have a GUI C++ application (Visual Studio 2008) that needs to be converted to a console one. I don't have any experience in C programming. Mostly I use .NET. Where do I start?

`int main(int argc, char *argv[]);` is where you start. – Bertrand Marron Mar 14 '10 at 12:11 — Bertrand Marron, Mar 14 '10 at 12:11

score 3 · Answer 1 · answered Mar 14 '10 at 14:25

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Start with refactoring. Make sure that GUI is separated from business logic. Then add another interface to access this business logic: one that uses console, rather than GUI widgets.

answered Mar 14 '10 at 14:25

Tadeusz A. Kadłubowski

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score 3 · Accepted Answer · answered Mar 14 '10 at 15:09

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Down-converting a GUI app is major surgery. The programming model is entirely different, a GUI app is event driven. Relying on a message loop to deliver events, processed in message handlers. And typically a bunch of controls that take care of the grunge work of taking input.

Given that you have to completely redesign the app to make it work as a console mode app and that you don't have experience with the language, writing this in a .NET language you have experience with is the best way to get it completed quickly.

answered Mar 14 '10 at 15:09

Hans Passant

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I'm attempting to execute a function before the call to CreateDialog, and the application crashes in crtexe.c, "Access Violation". How to fix the issue? – SharpAffair Mar 16 '10 at 12:22
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My crystal ball is cloudy, it can't see "a function". I can only recommend using a debugger. Please read this: http://catb.org/~esr/faqs/smart-questions.html – Hans Passant Mar 16 '10 at 12:27

score 2 · Answer 3 · edited May 23 '17 at 12:01

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Check out ncurses and readline to help you build a rich console application. You can't use them both at once, as I found out, so try ncurses if your application is more oriented toward output/display or will implement single-key interactions (hotkeys), and readline if it's more of a line-at-a-time user input situation.

edited May 23 '17 at 12:01

Community

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answered Mar 14 '10 at 14:21

John Zwinck

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score 1 · Answer 4 · answered Mar 14 '10 at 12:12

Create a new project with a main
add your files
here you got a console application doing nothing. It may still create windows, or if you like, hidden windows.
Now it's up to your creativity to tie interface to existing code.
Don't forget to download and use boost::program_options to access command line parameters properly.

Convert GUI C++ app to a console one

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