modified:   Makefile
	new file:   "\\"
	new file:   ex1
	new file:   ex3
	new file:   ex4
	new file:   ex4.c
	new file:   ex5
	new file:   ex5.c
	new file:   ex6
	new file:   ex6.c
	new file:   ex7
	new file:   ex7.c
	new file:   ex8
	new file:   ex8.c