l13.1e

<B>Digital的Unix操作系统VAX 4.2源码</B>

#print
This one is tougher than the last one. There are
several files in this directory whose names
begin with "hard". Remove them, then type "ready".
#create X1
#create X2
#
ls >X2
cp X1 "hard 1"
cp X1 "hard er"
#user
ls >X1
#cmp X1 X2
#log
#next
13.1f