l56.1a

<B>Digital的Unix操作系统VAX 4.2源码</B>

#print
Is there just as easy a way of
printing the immediately preceding line?
Not quite, but almost.  The line

-

will print the line just before the line you
are on.  What's the equivalent command
in terms of "." and "p"?  Type "answer COMMAND"
when you figure it out.  Again, you can experiment
first; the same file named "pres" is in this directory.
#create pres
George Washington
John Adams
Thomas Jefferson
James Madison
James Monroe
John Quincy Adams
Andrew Jackson
Martin van Buren
William Henry Harrison
John Tyler
James K. Polk
Franklin Pierce
Millard Fillmore
James Buchanan
Abraham Lincoln
#copyin
#user
#uncopyin
#match .-1p
The "p" isn't needed.
#match .-1
#log
#next
57.1a 10