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Full Discussion: Text stream K&R exercises
Operating Systems OS X (Apple) Text stream K&R exercises Post 302387241 by Jammer Six on Friday 15th of January 2010 02:20:39 AM
Old 01-15-2010
Quote:
Originally Posted by pludi
You said that it prints 6 1s if you just enter 5. Do you hit Return after entering the 5 characters? If so, there's your sixth.
Oh! The return character! Of course! duh...

Now, of course, I have another problem. I thought 1-8 would be easy, but not so much.

The code:

Code:
/*
 *  blank.c
 *	
 *	Exercise 1-8, write a program that counts blanks, tabs and newlines.
 */

#include <stdio.h>


main(){
	int x,s,t,n;
	
	s = 0; // counter for spaces
	t = 0; // counter for tabs
	n = 0; // counter for newlines
	
	while (x = getchar()!=EOF){
		
		if (x = " ") // x is a blank space
			s++;
		if (x = "\t") // x is a tab
			t++;
		if (x = "\n") // x is a newline
			n++;
		
	} // End while

	printf("\nThere were ");
	printf("%d", s);
	printf(" spaces.\n");
	
	printf("There were ");
	printf("%d", t);
	printf(" tabs.\n");
	
	printf("There were ");
	printf("%d", n);
	printf(" newlines.\n\n");
	
} // End main

It stays in a loop, but the loop isn't very well behaved.

It takes the input, and I figured that it should only increment the various counters if the character in question were the right type-- but no.

It increments EACH counter with EVERY character.

It has no discrimination. Enter 6 characters and a return, and it will say that there are 7 spaces, 7 tabs and 7 newlines.

I don't see how it's getting into each if statement! It's breaking all the rules!
 

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LEARN ABOUT DEBIAN

text::pdf::page

Text::PDF::Page(3pm)					User Contributed Perl Documentation				      Text::PDF::Page(3pm)

NAME

       Text::PDF::Page - Represents a PDF page, inherits from Text::PDF::Pages

DESCRIPTION

       Represents a page of output in PDF. It also keeps track of the content stream, any resources (such as fonts) being switched, etc.

       Page inherits from Pages due to a number of shared methods. They are really structurally quite different.

INSTANCE VARIABLES

       A page has various working variables:

       curstrm
	      The currently open stream

METHODS

       Text::PDF::Page->new($pdf, $parent, $index)

       Creates a new page based on a pages object (perhaps the root object).

       The page is also added to the parent at this point, so pages are ordered in a PDF document in the order in which they are created rather
       than in the order they are closed.

       Only the essential elements in the page dictionary are created here, all others are either optional or can be inherited.

       The optional index value indicates the index in the parent list that this page should be inserted (so that new pages need not be appended)

       $p->add($str)

       Adds the string to the currently active stream for this page. If no stream exists, then one is created and added to the list of streams for
       this page.

       The slightly cryptic name is an aim to keep it short given the number of times people are likely to have to type it.

       $p->ship_out($pdf)

       Ships the page out to the given output file context

perl v5.8.8							    2006-09-09						      Text::PDF::Page(3pm)
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