C++/SDL使用控制台窗口进行调试

Question

我正在玩一些OpenGL,使用SDL来处理窗口/输入等.目前我正在显示我想要查看的任何信息到HUD.好吧,这变得过于繁琐,我想知道是否有一种简单的方法可以打开一个单独的控制台窗口来向我报告这些信息.我仍然是C++的新手,所以如果这是一个显而易见的问题,请继续关注我.

Answer 1

以下代码适用于Windows.我总是觉得保持按需创建控制台窗口的能力很方便:

    int hConHandle;
    intptr_t lStdHandle;
    CONSOLE_SCREEN_BUFFER_INFO coninfo;
    FILE *fp;

    // allocate a console for this app
    AllocConsole();

    // set the screen buffer to be big enough to let us scroll text
    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &coninfo);
    coninfo.dwSize.Y = 500;
    SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), coninfo.dwSize);

    // redirect unbuffered STDOUT to the console
    lStdHandle = (intptr_t)GetStdHandle(STD_OUTPUT_HANDLE);
    hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
    fp = _fdopen( hConHandle, "w" );
    *stdout = *fp;
    setvbuf( stdout, NULL, _IONBF, 0 );

    // redirect unbuffered STDIN to the console
    lStdHandle = (intptr_t)GetStdHandle(STD_INPUT_HANDLE);
    hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
    fp = _fdopen( hConHandle, "r" );
    *stdin = *fp;
    setvbuf( stdin, NULL, _IONBF, 0 );

    // redirect unbuffered STDERR to the console
    lStdHandle = (intptr_t)GetStdHandle(STD_ERROR_HANDLE);
    hConHandle = _open_osfhandle(lStdHandle, _O_TEXT);
    fp = _fdopen( hConHandle, "w" );
    *stderr = *fp;
    setvbuf( stderr, NULL, _IONBF, 0 );

    // make cout, wcout, cin, wcin, wcerr, cerr, wclog and clog point to console as well
    std::ios::sync_with_stdio();

    //Keep our window in focus
    SetForegroundWindow(m_hWnd);                        // Slightly Higher Priority
    SetFocus(m_hWnd);                                   // Sets Keyboard Focus To The Window

此代码假定该HWND变量名为m_hWnd; 它是从我使用的类包装器中复制的.但是,如何HWND从SDL 获得这些权利取决于您.

要释放控制台,请调用:

FreeConsole();

AllocConsole并且FreeConsole是Win32 API函数.

Answer 2

在项目属性的链接器 -> 系统中，检查子系统是否为“Console (/SUBSYSTEM:CONSOLE)”。这会导致在运行程序时显示一个单独的控制台窗口。如果您当前的入口点不是main，那么您需要将其更改为该入口点。