I want to ask a queation?

chendong <[email protected]>
Newsgroups gmane.comp.web.html-tidy.user
Message-ID <[email protected]> 
for( TidyAttr attr = tidyAttrFirst( html ); attr; tidyAttrNext( attr ) )
	{
		cout<<tidyAttrValue( attr )<<endl;
	}
In this code, the cycle is not end. I want to ask how to set the end
condition.
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