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

1.1       root        1: #print
                      2: Write a program that counts the blanks, tabs, and newlines
                      3: in its input, and prints the total.  Don't forget to
                      4: define the value of EOF at the beginning of your program.
                      5: The best way is to add
                      6: 
                      7:  #include <stdio.h>
                      8: 
                      9: as the first line of your program.
                     10: The ____must be in column 1.
                     11: (See page 143 of the C book.)
                     12: You may also have to say
                     13: 
                     14: cc name.c -lS
                     15: 
                     16: to compile the program.
                     17: #once #create Ref
                     18: This is some junk that
                     19: contains
                     20:        blanks
                     21:        tabs
                     22:        and newlines.
                     23: #user
                     24: a.out <Ref >test1
                     25: a.out </dev/null >test2
                     26: grep 13 test1 >/dev/null || grep 0 test2 >/dev/null
                     27: #succeed
                     28: One possible solution:
                     29: 
                     30:  #include <stdio.h>
                     31: 
                     32: main()
                     33: {
                     34:        int n, c;
                     35: 
                     36:        n = 0;
                     37:        while ((c = getchar()) != EOF)
                     38:                if (c == ' ' || c == '\t' || c == '\n')
                     39:                        n++;
                     40:        printf("%d\n", n);
                     41: }
                     42: 
                     43: This program won't work on huge files, because an int
                     44: isn't big enough.
                     45: #log
                     46: #next
                     47: 5.1e 10
                     48: 5.2e 5

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