A bunch of C files that we played around with:

intro-1.c

C library stuff:

Strings::
string-1.c
string-2.c
string-2b.c
string-3.c
string-3b.c
string-4.c
string-4b.c
string-5.c
string-6.c
string-7.c
string-7b.c

Other::
math-1.c
memory-1.c
time-1.c

Files::
zstdio.h
file-1.c
file-2.c
file-3.c
file-4.c
file-5.c
file-6.c
file.out
file.txt

Malloc::
malloc-1.c
malloc-2.c
malloc-3.c
malloc-3b.c
malloc-3c.c
malloc-4.c
malloc-4b.c
malloc-4c.c

Linked list::
list-0.c
list-1.c
list-2.c
list-3.c
list-4.c
list-5.c
list-6.c

Library version of linked list:
liblist-1.c
liblist-1.h
liblist-2.c
liblist-2.h
liblist.a
liblist.c
liblist.h
makefile-liblist