Thread: whitespaces

  1. #1
    In my head happyclown's Avatar
    Join Date
    Dec 2008
    In my head
    I have a text file with the line:


    where *=whitespace. There are 19 whitespaces. I have to use * to show you whitespace, because for some reason, this forum won't allow more than a single whitespace between words or colums. And the tiny little forum compose box makes formatting a nightmare.

    So I wrote a program to count the whitespaces.

    #include <stdio.h>
    #include <stdlib.h>
    int main(void)
        FILE *openfile;
        int whitespacecount = 0, tabspacecount = 0;
        int c;
        /* Open file for reading */
        if( (openfile = fopen("directorylisting.txt", "rt")) == NULL )
        /* Count whitespaces while not EOF, or end of string */
        while( (c = getc(openfile) != EOF) && (c = getc(openfile) != '\0'))
            if (c = ' ')
            if (c = '\t')                    /* try to count columns of whitespace */
        printf("The number of whitespaces is %d\n", whitespacecount+1);
        printf("The number of tabspaces is %d\n", tabspacecount+1);
        return 0;
    But when I run the program, the output is 29, instead of 19 whitespaces. Why?

    Last edited by happyclown; 01-06-2009 at 10:28 PM. Reason: added +1

  2. #2
    and the hat of sweating
    Join Date
    Aug 2007
    Toronto, ON
    What I find even stranger is that you're calling getc() twice in each loop (so you're skiping every 2nd char) but yet you get more spaces than you expected, when I would expect you to get about half.
    "I am probably the laziest programmer on the planet, a fact with which anyone who has ever seen my code will agree." - esbo, 11/15/2008

    "the internet is a scary place to be thats why i dont use it much." - billet, 03/17/2010

  3. #3
    ... kermit's Avatar
    Join Date
    Jan 2003
    Something else you may want to check is this:
    if (c = ' ')
    if (c = '\t')

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