$ 7th edition Unix source code, c00.c, 1979 cc, cpp.c
#define
#else
#endif
#if
#ifdef
#ifndef
#include
#line
#undef
auto
break
case
char
continue
default
do
double
else
enum
extern
float
for
goto
if
int
long
register
return
short
sizeof
static
struct
switch
typedef
union
unsigned
while
