Aggregated List of Libraries Boost.Asio is really good. Asio is also available as a stand-alone library. ACE is also good, a bit more mature and has a couple of books to support it. C++ Network Library POCO Qt Raknet ZeroMQ (C++) nanomsg (C Library) nng (C Library) Berkeley Sockets libevent Apache APR yield Winsock2(Windows only) wvstreams zeroc libcurl libuv (Cross-platform C library) SFML’s Network Module C++ … Read more
The resolution of the time() function isn’t fine grained enough to result in different values to make a different result for each call you make, i.e. the CPU is faster. You might try to insert std::this_thread::sleep_for calls to check what timing resolution fits for your needs with the hardware and OS you have at hand.
You can declare all your classes and then define them in any order, like so:
C++20 introduced a guarantee that time_since_epoch is relative to the UNIX epoch, and cppreference.com gives an example that I’ve distilled to the relevant code, and changed to units of seconds rather than hours: Using C++17 or earlier, time() is the simplest function – seconds since Epoch, which for Linux and UNIX at least would be the UNIX epoch. Linux manpage here. The … Read more
For anyone else that comes across this question my problem was that the target directory contained spaces i.e. So for me the solution was to wrap $(TargetDir) in double quotes i.e.
It depends on what compiler you’re using. For example, if you are using Visual C++ .NET 2010 Express, run Visual C++ 2010 Express Command Prompt from the start menu, and you can simply compile and run the code. or from the regular command line, you can run vcvars32.bat first to set up the environment. Alternatively search for setvcvars.cmd (part … Read more
The common circular include problem occurs with:a.h b.h If some cpp includes “a.h” you might get away with it (if b.h didn’t really need a.h). But if that cpp instead includes b.h then b.h includes a.h BEFORE declaring things needed by a.h. Then a.h tries to include b.h but the include guard blocks that, so the compiler … Read more
Is there a general way to debug this error with VS2010? No, there isn’t. What you have done is to somehow invoke undefined behavior. The reason these behaviors are undefined is that the general case is very hard to detect/diagnose. Sometimes it is provably impossible to do so. There are however, a somewhat smallish number … Read more
The way to think about this is to “think like a compiler”. Imagine you are writing a compiler. And you see code like this. When you are compiling the .cc file (remember that the .cc and not the .h is the unit of compilation), you need to allocate space for object A. So, well, how much space then? Enough to store B! What’s … Read more