How to compile the code using #include

Question

I am trying to compile some C++ code that uses threads:

#include 
#include 
void hello()
{
    std::cout<<\"Hello Concurr         


        

Answer 1

Yes, the header file <thread> is only standard in the C++11 newest standard (finalized this year only).

With GCC, you'll need the very latest 4.6 version, and even with it, not everything is supported of the C++11 standard. See this table

Answer 2

As far as MSVC goes, the C++11 <thread> header isn't supported in VS2010 - you'll need to pull down a Developer Preview of Visual Studio 11 (http://msdn.microsoft.com/en-us/vstudio/hh127353) to try it out today.

See http://blogs.msdn.com/b/vcblog/archive/2011/09/12/10209291.aspx for details on what is new in C++ for Visual Studio 11.

Also, my PDF of the book (which is in pre-release at the moment) has the following definition of main():

int main()
{
    std::thread t(hello);
    t.join();
}

which avoids the problems you're running into with _TCHAR being undefined in GCC.

Answer 3

<thread> and standard threading support is a new feature (defined in the C++11 standard). As for g++, you have to enable it adding -std=c++0x to the command line, as explained in the error message.

Also, you are using a nonstandard (Microsoft-specific) main, use the "classic" main and normal char:

// thread1.cpp
#include <iostream>
#include <thread>

void hello()
{
    std::cout<<"Hello Concurrent World\n";
}

int main(int argc, char * argv[])
{
    std::thread t(hello);
    t.join();

    return 0;
}

Notice that not all C++11 features are available in current compilers; as far as g++ is concerned, you can find the status of their implementation here.