Write messages from cout to Visual Studio debug output window

visual_studio_cout_debug_output.cpp

// https://stackoverflow.com/a/47312126/1390945

class dbg_stream_for_cout
    : public std::stringbuf
{
public:
    ~dbg_stream_for_cout() { sync(); }
    int sync()
    {
        ::OutputDebugStringA(str().c_str());
        str(std::string()); // Clear the string buffer
        return 0;
    }
};
dbg_stream_for_cout g_DebugStreamFor_cout;
std::cout.rdbuf(&g_DebugStreamFor_cout); // Redirect std::cout to OutputDebugString!