I don't know c-well, or perlxs well, but I've done a few short programs and equally short modules with lots of cargoculting :)
Teach them to leverage the hardest of the hard and available linting tools
Is there anything like PPI or Perl::Critic for C? - Stack Overflow
Teach them similar idioms, stuff they can cargo-cult, http://rosettacode.org/wiki/C, C idioms in Perl, aww :) doesn't have c PLEAC - Programming Language Examples Alike Cookbook...
C Traps and Pitfalls/http://www.literateprogramming.com/ctraps.pdf
informative funny slideshow/presentation cartoon interview with c-programmer deep-c-and-c++ Deep C (and C++) Geektalk
and from the same guy a 2-3 day course on learning c (ITS GITHUB) cf - C Foundation course
also available at http://www.jaggersoft.com/c_course/index.html / http://www.jaggersoft.com/c_course_2/index.html
Extending and Embedding Perl (book has C tutorial)
I've not seen a book/tutorial that covers everything you're looking for, but these links may help: Re: Using a shared object in perl, Manning: Extending and Embedding Perl jenness_ch02.pdf, XSLoader, DynaLoader
http://search.cpan.org/dist/illguts/index.html
more
shotgun/linkdumpexampless
or even
Inline::C, see
Getting Started with Inline::C,
Re: Inline::C with multiple *.c,
Efficient bit-twiddling in Perl.,
In-place bitwise NOT?,
Also curious Re: How to use C Libraries in Perl Script?, ExtUtils::Depends - Easily build XS extensions that depend on XS extensions, InlineX::XS - Auto-convert Inline::C based modules to XS, InlineX::C2XS
start with Inline::C instead?
Switch to Inline::C, Re: h2xs on Windows
Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values.
Call a C function from Perl used from C
Getting Started with Inline::C
Calling a function form an external DLL with Inline::C on windows
Tips via Exploring Inline::C (Generating primes)
Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values.
XS++ - bonding Perl and C++ with minimal pain
See also Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values. , Re: Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values.,
and these things the replies reference
Module::Build::WithXSpp - XS++ enhanced flavour of Module::Build
XS++ - bonding Perl and C++ with minimal pain (YAPC::EU in Pisa)
Math::ThinPlateSpline
XSpp::Example
perlhacktips#Portability problems -Dgccansipedantic PERL_GCC_PEDANTIC "gcc -ansi -pedantic -Wall -Wextra"
Cyclone (programming language), Buffer overflow protection,, Read perlclib, use Safefree
Maybe you can find more stuff via parent/op of Re: How to teach perl to novice programer
food luck :)