How do I extend the following program to display basic GUI element Button in Cygwin on Windows?

#include <stdio.h>

int main(int argc, char **argv) {
  printf("Hello, World!\n");

And to compile and run.

gcc hello.c -o hello.exe
  • Wouldn't this question (which is not related to Unix) better asked on StackOverflow or Programmer? – Basile Starynkevitch Nov 9 '15 at 6:28
  • @BasileStarynkevitch Cygwin is technically unix although you are right it is more about c then unix. I have not tried this question on SO, but I feel like it might be closed or more likely put on hold for being either being to broad or narrow. SO is often a little more stringent on questions but I will try it. – William Nov 21 '15 at 16:30

You cannot do that without some specific GUI library, since standard C99 or C11 does not define any.

BTW, you should compile with gcc -Wall -g hello.c -o hello.exe ; you really want all warnings and debug info.

You might consider using some cross-platform GUI library GTK or libsdl or (in C++) Qt. You'll need to install it before using it and of course pass additional arguments to gcc (several -I directives before the source file, several -L directives and -l libraries from high-level to low-level). Notice that order of arguments to gcc is important. You may want to use GNU make as your builder, with your own Makefile ...

(I don't know Windows and I recommend Linux; perhaps some system provided Windows GUI library is usable from Cygwin)

Your program will then become event-driven, with the event loop usually provided by the GUI library. It will become much more complex.

You could (instead of a desktop GUI approach) consider making your program some specialized Web server; you'll then use some HTTP server library (I know about libonion, but it probably has not been ported to Windows), and your program would become a Web application usable thru a browser, and should also be event-driven.

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  • 1
    you might want to conside targeting mingw instead of cygwin. – Jasen Nov 9 '15 at 9:08

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