Thread: Word counting [1.5.4 The C programming language book ]

  1. #1
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    Word counting [1.5.4 The C programming language book ]

    I have just started learning programming myself referring "The C Programming Language by Brian Kernighan and Dennis Ritchie". In the following program

    Code:
    #include <stdio.h>
    
    
    int main ()
    {
        int c , n , state , nc , nw , nl ;
        state = 0 ;
        nc = nw = nl = 0 ;
        while ((c = getchar()) != EOF)
        {
            ++nc ;
            if (c == '\n')
                ++nl ;
            if (c == ' ' || c == '\n')
                state = 0 ;
            else if (state == 0 )
            {
                state = 1 ;
                ++nw ;
            }
            printf("%2d%2d%2d%2d\n" , state ,nc , nw , nl ) ;
        }
        }
    i modified a bit by putting printf() in the loop but i cant understand how its working as getchar() reads character by character when it encounters "abc" after reading 'a' the state should be changed to 1 and it would not read b and c .
    I may be wrong but that what I understood . Sorry if the question is pretty basic but i don't wanna move forward with broken concepts.

    Thanks in advance

  2. #2
    Registered User hk_mp5kpdw's Avatar
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    The read operation happens regardless of what value the state variable has, it runs until EOF is achieved.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  3. #3
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    But the value of the state variable will be one , how it will read the upcoming characters?

  4. #4
    Hurry Slowly vart's Avatar
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    Quote Originally Posted by LearnerForever View Post
    But the value of the state variable will be one , how it will read the upcoming characters?
    why do you think state variable value will interfere with reading character?
    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    Ė David J. Wheeler

  5. #5
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    Thanks for the replies I understood the concept , it is counting word only.

    Thanks for the replies

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