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Top Forums Programming A trivial XOR doubt in a program Post 302247330 by jim mcnamara on Wednesday 15th of October 2008 12:05:00 PM
Old 10-15-2008
The short answer - it is an undefined operation. Means that the C standard regards this as garbage, and your compiler was polite enough to produce spaces.
The reason: there are no sequence points in the line between important steps.

A ; character creates a sequence point. So the first version works. This means the compiler can do any of those calculations in any order...

By the way, that 'swap' algorithm in general is a bad idea; it has unsafe properties. You should use a temp variable. It may look cool to you, but that is about it.
 

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.::SWF::TextField(3pm)					User Contributed Perl Documentation				    .::SWF::TextField(3pm)

NAME
SWF::TextField - SWF TextField class SYNOPSIS
use SWF::TextField; $textfield = new SWF::TextField([$flags]); DESCRIPTION
Unlike SWF::Text objects, TextFields cannot be rotated, scaled non-proportionally, or skewed. However, TextFields can be used as form entries and they can use browser-defined fonts. NOTES
: TextField is implemented into Flash since Flash3. Most of features for TextFields are available since Flash4. Simple HTML-tags in TextField are possible since Flash5. METHODS
new SWF::TextField([$flags]); Creates a TextField object whose behaviour is dictated by "flags" (see also SWF::Constants): SWFTEXTFIELD_NOEDIT: Non-editable Textfiled SWFTEXTFIELD_PASSWORD: Obscure user input with astricts. SWFTEXTFIELD_DRAWBOX: Draw a border around TextField SWFTEXTFIELD_MULTILINE: TextFiels may contain multiple lines SWFTEXTFIELD_WORDWRAP: Warp text when text reaches TextField border SWFTEXTFIELD_NOSELECT: TextField is not selected when user clicks on it SWFTEXTFIELD_ALIGN_LEFT: Align text to the left SWFTEXTFIELD_ALIGN_RIGHT: Align text to the right SWFTEXTFIELD_ALIGN_CENTER: Align text to the center SWFTEXTFIELD_ALIGN_JUSTIFY: Justify text SWFTEXTFIELD_HTML: Add HTML markup string SWFTEXTFIELD_HASLENGTH: SWFTEXTFIELD_USEFONT: Want to embed font SWFTEXTFIELD_AUTOSIZE: Flags may be combined with the bitwise OR operation. For example: my $t = new SWF::TextField(SWFTEXTFIELD_MULTILINE | SWFTEXTFIELD_WORDWRAP); $textfield->addString($string) $textfield->addUTF8String($UTF8string) Add $string to TextField. Text is appended to the existing text. $textfield->align($alignment) $textfield->setAlignment($alignment) Set the alignment of the text in the textfield. Possible values are SWFTEXTFIELD_ALIGN_LEFT SWFTEXTFIELD_ALIGN_RIGHT SWFTEXTFIELD_ALIGN_CENTER SWFTEXTFIELD_ALIGN_JUSTIFY By default a SWF::TextField ist left aligned. $textfield->setBounds($width, $height) Sets the width and height of the textfield. $textfield->setColor($red, $green, $blue [, $alpha]) Set the color of the text. An 8 bit value for each parameter. You can use the hex or decimal notation. Even mixed. $tf->setColor(0xcc,0,0x33); $tf->setColor(204,0,51,255); $textfield->setFont($font) Sets an SWF::Font object -$font- to be used in the TextField. $textfield->setPadding($padding) Set TextField padding. $textfield->setHeight($height) Set the height of font in your textfield. $textfield->setIndentation($indentation) Set the indentation of the first line of a paragraph. $textfield->setLeftMargin($left) Sets the left margin of the textfield. $textfield->setRightMargin($right) Sets the right margin of the textfield. $textfield->setMargins($left, $right) Sets left and right margins of $textfield. $textfield->setLineSpacing($linespacing) Sets the space between lines. $textfield->setName($name) $textfield->setVariableName($name) Assigns a name to the TextField which could be used to reference the TextField within ActionScript. $textfield->addChars($string) $textfield->addUTF8Chars($UTF8string) Adds characters to a font that will be available within a textfield. $textfield->setFlags($flags) Set TextField behaviour by "flags" (see above new SWF::TextField) For example: $textfield->setFlags(SWFTEXTFIELD_PASSWORD); $textfield->setLength($length) Sets limit for user input size to $length. $textfield->setFieldHeight($height) Sets height limit for visible part of text field. If $height is set to 0, the height is calculated by used font, see setHeight() method. AUTHOR
Soheil Seyfaie (soheil at users.sourceforge.net). SEE ALSO
SWF, SWF::Action, SWF::Button, SWF::Constants, SWF::DisplayItem, SWF::Font, SWF::Movie, SWF::MovieCip, SWF::Text perl v5.14.2 2011-10-26 .::SWF::TextField(3pm)
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