lassie% cc201 wrong1.c
cc201: Command not found.
lassie% 

lassie% cc hello.c
hello.c:11: genlib.h: No such file or directory
lassie% 

lassie% mkdir ~/bin
lassie% cp ~chang/pub/cs201/cc201 ~/bin
lassie% 
lassie% cc201 hello.c
cc201: Command not found.
lassie% 

lassie% rehash
lassie% cc201 hello.c
lassie% a.out
Hello, world.
lassie% 

lassie% cc201 wrong1.c
/usr/bin/ld:
Error: Undefined:
pirntf
Printf
getinteger
GETINTEGER
lassie%