Improved compilation of Appendices A and C.
	modified:   Makefile
	modified:   listing_a.01.cpp
	modified:   listing_a.02.cpp
	modified:   listing_a.04.cpp
	modified:   listing_c.01.cpp
	modified:   listing_c.02.cpp
	modified:   listing_c.04.cpp
	modified:   listing_c.05.cpp
	modified:   listing_c.06.cpp