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Annotation of 42BSD/usr.lib/learn/C/L5.1c, revision 1.1.1.1

1.1       root        1: #print
                      2: (Section 1.5)
                      3: Write a program which reads one character from
                      4: its input; if that character is ? it prints "yes",
                      5: otherwise it prints "no".
                      6: Compile it, test it, and then type ready.
                      7: #once #create Ref1
                      8: ? is here
                      9: #once #create Ref2
                     10: no ? at beginning
                     11: #user
                     12: a.out <Ref1 >test1
                     13: a.out <Ref2 >test2
                     14: grep yes test1 >/dev/null || grep no test2 >/dev/null
                     15: #succeed
                     16: This is one possible solution
                     17: 
                     18: main()
                     19: {
                     20:        if (getchar() == '?')
                     21:                printf("yes\n");
                     22:        else
                     23:                printf("no\n");
                     24: }
                     25: 
                     26: The indenting and general formatting of C programs
                     27: should be done so you make the structure clear,
                     28: like the code above.
                     29: #log
                     30: #next
                     31: 5.1d 10

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