How do you open gcc compiler in ubuntu?

Answer 1

You don't "open" gcc, you "use" it.

$ cat >helloworld.c

/* helloworld.c */

#include

int main (void)

{

puts ("Hello, world");

return 0;

}

^D

$ gcc -W -Wall -pedantic -o helloworld helloworld.c

$ ./helloworld

Hello, world

Answer 2

I'm not sure what is meant by 'open' in the question.

If gcc is installed, to compile a 'C' source file...

$ gcc -o hello hello.c

will compile a 'C' source file named hello.c, naming the compiled binary file 'hello'.

I suspect this is not precisely what is meant in the question though. If the use of a GUI is desired, there are many that will invoke the gcc compiler without leaving the GUI editor. Of course, the first and perhaps best of these, is Emacs (though anyone with a dissenting opinion is welcome to debate the relative merits of other editors with RMS, I have no desire to enter into such a debate.)