Graphical user interface Tutorial in C

Question

I have a project in C language and the teacher ordered to make a Gui of project. I can only use C or C++ for the GUI part.

Can anyone please suggest me Some easy open so

Answer 1

The two most usual choices are GTK+, which has documentation links here, and is mostly used with C; or Qt which has documentation here and is more used with C++.

I posted these two as you do not specify an operating system and these two are pretty cross-platform.