What is easiest way to create multithreaded applications with C/C++?

Question

What is the easiest way to create multithreaded applications with C/C++?

Answer 1

The C++0x specification includes threading facilities (one of my favorite new features). Soon it won't matter what OS you're compiling for! Just look how easy it is to create a new thread and join back to the creator thread:

#include 
#include 

class SayHello
{
public:
    void operator()() const
    {
        std::cout<<"hello"<

Visual Studio 2010 is implementing parts of C++0x but we're still waiting on the threading facilities.