I could not build boost code,

I have sample code, I just wanted to build it. I am trying to send log to a file, unfortunately the init function part does not compile, I posted code and compile error as follows, I just wonder what I did wrong here:
Thanks for your help.

Here is the code I am compiling, boost has setup correctly, I can build main part, it running and output message on the console, I just need to redirect to a file, but I could not build init() function:

#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/utility/setup/file.hpp>

using namespace boost::log;

void init()

        logging::trivial::severity >= logging::trivial::info

int main(int, char*[])
	BOOST_LOG_TRIVIAL(trace) << "A trace severity message";
	BOOST_LOG_TRIVIAL(debug) << "A debug severity message";
	BOOST_LOG_TRIVIAL(info) << "An informational severity message";
	BOOST_LOG_TRIVIAL(warning) << "A warning severity message";
	BOOST_LOG_TRIVIAL(error) << "An error severity message";
	BOOST_LOG_TRIVIAL(fatal) << "A fatal severity message";

	return 0;

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Here is the compile output:

1>------ Build started: Project: testboostLogging, Configuration: Debug x64 ------
1>Build started 9/29/2016 7:35:19 AM.
1>  Touching "x64\Debug\testboostLogging.unsuccessfulbuild".
1>  testboostLogging.cpp
1>testboostLogging.cpp(13): error C2653: 'logging' : is not a class or namespace name
1>testboostLogging.cpp(15): error C2653: 'logging' : is not a class or namespace name
1>testboostLogging.cpp(16): error C2227: left of '->set_filter' must point to class/struct/union/generic type
1>          type is ''unknown-type''
1>testboostLogging.cpp(17): error C2653: 'logging' : is not a class or namespace name
1>testboostLogging.cpp(17): error C2065: 'severity' : undeclared identifier
1>testboostLogging.cpp(17): error C2653: 'logging' : is not a class or namespace name
1>testboostLogging.cpp(18): error C2065: 'info' : undeclared identifier
1>testboostLogging.cpp(15): error C3861: 'get': identifier not found
1>Build FAILED.
1>Time Elapsed 00:00:22.41
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I am using boost 1.59.0 at this time, I have compiled the code for both 64 bit.
Does anyone knows what is wrong?

Evan LiSr SW EngineerAsked:
Who is Participating?
ZoppoConnect With a Mentor Commented:
Hi Evan Li,

well, the first error does clearly show what the problem is:

testboostLogging.cpp(13): error C2653: 'logging' : is not a class or namespace name

Most (if not all) Boost functions/classes you use are declared in namespace boost::log, there's no namespace boost::log::logging, so to solve the compile errors it should be enout to remove all occurances of logging:: from your code.

Hope that helps,

Evan LiSr SW EngineerAuthor Commented:
Thank you very much,

I added following line:
namespace logging = boost::log;

This makes it to be build.
Hm - why do you want to delete this question? Didn't my comment correctly identify the problem you had?

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Evan LiSr SW EngineerAuthor Commented:
Yes, your comment helps. Thank you. Let me make your comment to be the best solution.
Evan LiSr SW EngineerAuthor Commented:
There is no way I can do it again.
Hi Evan Li,

here you can find how to handle cases like There was a mistake made when closing the question and awarding points: http://support.experts-exchange.com/customer/portal/articles/539391-the-request-attention-system 

Best regards,

Evan LiSr SW EngineerAuthor Commented:
If you disagree with the way a question you participated in was closed, you can either post an Objection or Request Attention, depending on how the question was closed.
Can you post objection?
@Moderator: We agreed to not delete this question, could you please re-open it so Evan Li can select #a41822992 as answer?
Evan LiSr SW EngineerAuthor Commented:
Thanks. Close this question here
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