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Annotation of 42BSD/usr.lib/learn/C/L15.1b, revision 1.1

1.1     ! root        1: #print
        !             2: Write a program that reads in lines, and prints each out
        !             3: in reverse order (except that the newline should be
        !             4: at the end).
        !             5: Thus the line
        !             6: cat food
        !             7: should come out as
        !             8: doof tac
        !             9: Compile it and run it, then type "ready".
        !            10: #once #create Ref1
        !            11: This is odd.
        !            12: This is even.
        !            13: 
        !            14: #once #create Ref2
        !            15: .ddo si sihT
        !            16: .neve si sihT
        !            17: 
        !            18: #once cp %s/getline.o .
        !            19: #user
        !            20: a.out <Ref1 >x1
        !            21: #cmp x1 Ref2
        !            22: #succeed
        !            23: /*     one way to do this */
        !            24:  #include <stdio.h>
        !            25: 
        !            26: main()
        !            27: {
        !            28:        char line[500];
        !            29:        int n;
        !            30: 
        !            31:        while ((n = getline(line, 500)) > 0) {
        !            32:                for (n -= 2; n >= 0; n--)
        !            33:                        putchar(line[n]);
        !            34:                putchar('\n');
        !            35:        }
        !            36: }
        !            37: #log
        !            38: #next
        !            39: 17.1a 10
        !            40: 16.2a 5

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