is this a bug of g++? Post: 302503601

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Top Forums Programming is this a bug of g++? Post 302503601 by homeboy on Friday 11th of March 2011 04:24:42 AM

03-11-2011

Registered User

is this a bug of g++?

Hello,
Im using the g++(g++ Ubuntu/Linaro 4.4.4-14ubuntu5 4.4.5) and im trying to compile a small snippet code and got into an endless loop.I recompiled that in VS2010 under Windows 7 and the answer is as expected.so i wonder is this a bug of g++?here is my code.

Code:

#include<iostream>

using namespace std;

int main()
{
	int val;

	while(cin>>val,!(cin.eof())){
		if(cin.fail()){
			cerr<<"bad data,try again"<<endl;;
			cin.clear();
			continue;
		}else if(cin.good()){
			cerr<<"you entered :"<<val<<endl;
			break;
		}
}
}

---------- Post updated at 04:24 AM ---------- Previous update was at 04:07 AM ----------

Actually,the code::blocks with Mingw runs the code below OK while my g++ gets a endless loop.

Code:

#include <iostream>
using namespace std;

int main()
{
	int val;

	while(cin>>val,!cin.eof()){
		if(cin.fail()){
			cerr<<"failed,try again"<<endl;
			cin.clear();
			cin.sync();      //ADD THIS
		}else if(cin.good()){
			cout<<"you entered: "<<val<<endl;
			break;
		}
	}
}

Last edited by homeboy; 03-11-2011 at 06:11 AM..

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LEARN ABOUT MOJAVE

datetime::timezone::local::win32

DateTime::TimeZone::Local::Win32(3)			User Contributed Perl Documentation		       DateTime::TimeZone::Local::Win32(3)

NAME

       DateTime::TimeZone::Local::Win32 - Determine the local system's time zone on Windows

VERSION

       version 1.63

SYNOPSIS

	 my $tz = DateTime::TimeZone->new( name => 'local' );

	 my $tz = DateTime::TimeZone::Local->TimeZone();

DESCRIPTION

       This module provides methods for determining the local time zone on a Windows platform.

HOW THE TIME ZONE IS DETERMINED

       This class tries the following methods of determining the local time zone:

       o   $ENV{TZ}

	   It checks $ENV{TZ} for a valid time zone name.

       o   Windows Registry

	   When using the registry, we look for the Windows time zone and use a mapping to translate this to an Olson time zone name.

	   o	   Windows Vista and 2008

		   We look in "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/" for a node named "/TimeZoneKeyName". If this exists, we use
		   this key to look up the Olson time zone name in our mapping.

	   o	   Windows NT, Windows 2000, Windows XP, Windows 2003 Server

		   We look in "SOFTWARE/Microsoft/Windows NT/CurrentVersion/Time Zones/" and loop through all of its sub keys.

		   For each sub key, we compare the value of the key with "/Std" appended to the end to the value of
		   "SYSTEM/CurrentControlSet/Control/TimeZoneInformation/StandardName". This gives us the English name of the Windows time zone,
		   which we use to look up the Olson time zone name.

	   o	   Windows 95, Windows 98, Windows Millenium Edition

		   The algorithm is the same as for NT, but we loop through the sub keys of "SOFTWARE/Microsoft/Windows/CurrentVersion/Time
		   Zones/"

AUTHOR

       Dave Rolsky <autarch@urth.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2013 by Dave Rolsky.

       This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

perl v5.18.2							    2013-10-28				       DateTime::TimeZone::Local::Win32(3)