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Annotation of 42BSD/usr.lib/learn/editor/L8.1a, revision 1.1.1.1

1.1       root        1: #print
                      2: To move around, you can use simple arithmetic
                      3: when specifying what to print.  For example,
                      4:   3+1p
                      5: is the same as
                      6:   4p
                      7: as an editor command.  Now that's not very interesting;
                      8: but if the '.' current line pointer is line 3,
                      9: then using
                     10:   .+1p
                     11: instead of 4p is helpful.
                     12: For example, print the 3rd and 4th
                     13: lines of the familiar file using first "3p" to
                     14: get to line 3 and then ".+1p" to print the next line.
                     15: End as usual with w, q, and ready.
                     16: #create Ref
                     17: :thomas jefferson
                     18: :james madison
                     19: :"file" 6 lines, 91 characters
                     20: #create file
                     21: george washington
                     22: john adams
                     23: thomas jefferson
                     24: james madison
                     25: james monroe
                     26: john quincy adams
                     27: #copyout
                     28: #pipe
                     29: ex +'set prompt noopt open' file
                     30: #user
                     31: #unpipe
                     32: #uncopyout
                     33: tail -3 .ocopy >X1
                     34: #cmp Ref X1 3
                     35: #log
                     36: #next
                     37: 9.1a 10
                     38: 8.1b 7

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