boost problem in windows 7

I have written the following code

#include <iostream>
#include <boost/asio.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/filesystem.hpp>
#incl开发者_开发百科ude <boost/system/windows_error.hpp>

using namespace boost::system;

int main(){

    boost::asio::io_service io;
    boost::asio::deadline_timer t(io,boost::posix_time::seconds(5));
    t.wait();
    std::cout<<"hello world";
    return 0;
}

and I get the following error:

1>LINK : fatal error LNK1104: cannot open file 'libboost_system-vc100-mt-gd-1_44.lib'

I dont know how and what do, can you please explain what is happening and what steps I can take to fix it?

Ok, for MSVC++ 2010

Under Project Properties, goto

Configuration Properties -> Linker -> General -> Additional Library Directories and add there the path to the *.lib file (For example: C:\boost_1_41_0\stage\lib)

As far as I can tell from the error message it compiles but can't find the boost compiled libraries.

These you have to build yourselves unless you can find them prebuilt.

IIRC boost are built using a tool called bjam. I think this explains it rather throughly: http://www.highscore.de/cpp/boostbuild/index.html.

After it's built you have to instruct the compiler to link it using the project properties.

I suspect you haven't built the libraries. You can get the pre-built libraries from BoostPro or you can build them yourself following the instructions at http://www.boost.org/doc/libs/1_44_0/more/getting_started/windows.html

I was working in one instance of Visual Studio 2010. When I started up another, to scrawl out a bit of code, I was shocked to see the same error message. Reset includes and lib (Project->NameofProject Properties then select VC++ Directories) and toggled back and forth between debug and release, at first just once, then a few more times, as I grew increasingly alarmed at none of this working.

Even though the IDE didn't report any activity ('Build Failed,' was all it said in the place where it shows includes/libs being enumerated) after a few minutes (of furious web browsing) I came back to discover that it had silently self-fixed.