Can I write a GUI program in the C language in Fedora?

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There are multiple choices for this. On the command line, there is ncurses and newt and for the X interface, there is GTK and Qt among others.

Of course - there are many examples. Like MyPaint or GIMP if this is what you understand under "graphics" program. GIMP is written in C (better GObject) and MyPaint is written in Python.

If you think about User Interfaces then there is GTK+ for C and Qt for C++.

You might like to lookup -

for KDE apps http://doc.qt.nokia.com/4.7/tutorials.html http://techbase.kde.org/Development/Tutorials/ProgrammingTutorialKDE_4

for GNOME http://www.gtk.org/documentation.php http://live.gnome.org/Vala/Tutorial

A "graphics program" could cover many different things.

If you're interested in learning graphics programming in C on Fedora, a good place to start might be the Cairo tutorial: http://cairographics.org/tutorial/

Cairo is the 2D API that underpins the GTK stack, and the principles are applicable to many other graphical APIs, so it's worth a look if you want to learn graphical programming.

Running:

yum install cairo-devel gcc

on a Fedora box should give you the dependencies you need to run the demo.

Hope this is helpful

Another interesting language, especially for a GNOME desktop, is vala.

It is easier than C but you can use many "GUI related" libraries (written in e.g. C) you will need to create your own GUI program.

Have alook here for exampel code: https://live.gnome.org/Vala/Documentation#Sample_Code

You can try to use Eclipse or install VIM GUI and make .c file to write another way is use Emacs,

But I suggest to use Eclipse and I remmembered now ,

http://www.eclipse.org/

Take a look to "monodevelop"

http://monodevelop.com/

Good Luck .