How to Linux Program

Ok it compiled good but the out file, which is new to me used to exe, won't even start.

Try running it as

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./a.out

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Also, you can name the executable anything you want by using the -o option:

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gcc -o myprog.exe myprog.c

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But it is highly uncustomary for Linux executables to have an extension.

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gcc -o myprog myprog.c

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Of course, this can be done easier:

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make myprog

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You should also check out the GNU docs:
www.delorie.com/gnu/docs/glibc/libc_toc.html
GNU make glibc and gcc (which all linux systems and distros use). These are quite readable and informative. I think they also address some of your question re: how POSIX relates to "C", etc.
Good luck.

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Originally Posted by CornedBee

But it is highly uncustomary for Linux executables to have an extension.

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True enough! Just thought it might shield him from the "horrors" of Linux ;)

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Originally Posted by CornedBee

Code:

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gcc -o myprog myprog.c

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Of course, this can be done easier:

Code:

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make myprog

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You know, I've been developing various *nix flavors for 13 years, and I did not know that. And a Google shows that if I set the CFLAGS environment variable, I can default to use -g -Wall. Thanks :)