C++ Main函数代码示例

int main(int argc, char **argv) {
    std::vector<option> options;
    for (auto it = options_plus.begin(); it != options_plus.end(); ++it) {
        option op = {it->name, it->has_arg, it->flag, it->val};
        options.push_back(op);
    }

    Config config;
    std::string train_file;
    std::string save_vectors;
    std::string save_vectors_bin;

    while (1) {
        int option_index = 0;
        int opt = getopt_long(argc, argv, "hv", options.data(), &option_index);
        if (opt == -1) break;

        switch (opt) {
            case 0:                                           break;
            case 'h': print_usage();                          return 0;
            case 'v': config.verbose = true;                  break;
            case 'a': config.dimension = atoi(optarg);        break;
            case 'b': config.min_count = atoi(optarg);        break;
            case 'c': config.window_size = atoi(optarg);      break;
            case 'd': config.n_threads = atoi(optarg);        break;
            case 'e': config.max_iterations = atoi(optarg);   break;
            case 'f': config.negative = atoi(optarg);         break;
            case 'g': config.starting_alpha = atof(optarg);   break;
            case 'i': config.subsampling = atof(optarg);      break;
            case 'j': config.skip_gram = true;                break;
            case 'k': config.hierarchical_softmax = true;     break;
            case 'l': config.sent_vector = true;              break;
            case 'm': train_file = std::string(optarg);       break;
            case 'n': save_vectors = std::string(optarg);     break;
            case 'o': save_vectors_bin = std::string(optarg); break;
            default:                                          abort();
        }
    }

    if (!train_file.empty()) {
        if (!save_vectors.empty()) {
            Main(train_file, save_vectors, config);
            return 0;
        }
        else if (!save_vectors_bin.empty()) {
            config.binary = true;
            Main(train_file, save_vectors_bin, config);
            return 0;
        }
    }

    print_usage();
    return 0;
}

int OverlappedCall::TryMain()
{
	int ret;
	__try
	{
		_set_thread_local_invalid_parameter_handler(InvalidCrtParameterHandler);
		ret = Main();
	}
	__except(MainExceptionFilter(GetExceptionInformation()))
	{
		#if TRACING == 1
		{
			TRACELOCK();
			TRACESTREAM << std::hex << GetCurrentThreadId()<< L": Terminating; " << *this << std::endl;
		}
		#endif
		
		NotifyInterpreterOfTermination();
		ret = 0;
	}

	Term();	// Thread is terminating, so don't want handles (also lets Complete() know we have terminated)

	return ret;
}

int PASCAL WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow )
{
	App::hInstance = hInstance;
	App::hPrevInstance = hPrevInstance;
	App::CmdLine = lpszCmdLine;
	App::nCmdShow = nCmdShow;

	int ret=Main();

	// TextWindow open
	if (App::TextWindow && (App::TextWindow->StayOpen))
	{
		App::TextWindow->Parent=NULL;
		App::MainWindow=(Object *) App::TextWindow;
		String S(GetWindowTextLength(App::MainWindow->hWnd)+1);
		GetWindowText(App::MainWindow->hWnd,S,S.Size());
		S.Update();
		S << " (finished)";
		SetWindowText(App::MainWindow->hWnd,S);
		ShowWindow(App::MainWindow->hWnd, SW_SHOW );
		// wait until closed
		return App::MessageLoop();
		// delete App::TextWindow; ??
		}
	return ret;
}

//*****************************************************************************
//
// This is the code that gets called when the processor first starts execution
// following a reset event.  Only the absolutely necessary set is performed,
// after which the application supplied entry() routine is called.  Any fancy
// actions (such as making decisions based on the reset cause register, and
// resetting the bits in that register) are left solely in the hands of the
// application.
//
//*****************************************************************************
void
ResetISR(void)
{
    unsigned long *pulSrc, *pulDest;

    //
    // Copy the data segment initializers from flash to SRAM.
    //
    pulSrc = &_etext;
    for(pulDest = &_data; pulDest < &_edata; ) {
        *pulDest++ = *pulSrc++;
    }

    //
    // Zero fill the bss segment.
    //
    for(pulDest = &_bss; pulDest < &_ebss; ) {
        *pulDest++ = 0;
    }

    //
    // Call the application's entry point.
    //
    Main();
}

bool TaskQueue::ProcessOneMainTask() { // static
	std_::unique_ptr<Task> task;
	{
		QMutexLocker lock(&Main().tasks_mutex_);
		auto &tasks = Main().tasks_;
		if (tasks.empty()) {
			return false;
		}

		task.reset(tasks.front());
		tasks.pop_front();
	}

	(*task)();
	return true;
}

int main(int argc, char **argv)
{
    while (true) {
        int action = Main();

        switch (action) {
        case LAUNCH_NICKEL:
            KoboExecNickel();
            return EXIT_FAILURE;

        case SimulatorPromptWindow::FLY:
            KoboRunXCSoar("-fly");
            /* return to menu after XCSoar quits */
            break;

        case SimulatorPromptWindow::SIMULATOR:
            KoboRunXCSoar("-simulator");
            /* return to menu after XCSoar quits */
            break;

        case POWEROFF:
            KoboPowerOff();
            return EXIT_SUCCESS;

        default:
            return EXIT_SUCCESS;
        }
    }
}

static int
Main()
{
    dialog_settings.SetDefaults();

    ScreenGlobalInit screen_init;
    Layout::Initialize({600, 800});
    InitialiseFonts();

    DialogLook dialog_look;
    dialog_look.Initialise();

    TopWindowStyle main_style;
    main_style.Resizable();

    SingleWindow main_window;
    main_window.Create(_T("XCSoar/KoboMenu"), {600, 800}, main_style);
    main_window.Show();

    global_dialog_look = &dialog_look;
    global_main_window = &main_window;

    int action = Main(main_window, dialog_look);

    main_window.Destroy();

    DeinitialiseFonts();

    return action;
}

int main( int argc, char* argv[] )
{
	Allocator::Enable( true );
	Allocator::GetDefault().Initialize( g_MainMemorySize );

	Main( argc, argv );

#if DO_PROFILING
#if BUILD_DEBUG	// I ship Release ContentSyncer, not Final.
	Profiler::GetInstance()->Dump( FileStream( "profiler.txt", FileStream::EFM_Write ) );
#endif
	Profiler::DeleteInstance();
#endif

#if BUILD_DEBUG
	Allocator::GetDefault().Report( FileStream( "content-syncer-memory-exit-report.txt", FileStream::EFM_Write ) );
#endif
	DEBUGASSERT( Allocator::GetDefault().CheckForLeaks() );
	Allocator::GetDefault().ShutDown();

	DEBUGASSERT( _CrtCheckMemory() );
	DEBUGASSERT( !_CrtDumpMemoryLeaks() );

	return 0;
}

 void BaseTask::Run()
 {
     if (_cancelled) {
         return;
     }
     Main();
 }

int APIENTRY WinMain (HINSTANCE hInst, HINSTANCE hPrev, LPSTR lpCmd, int nShow)
{
	char **argv= NULL;
	int argc;

	win_command_line = GetCommandLine();
	argc = makeargv(win_command_line, " \t\n", &argv);

	Main(argc, (char **) argv);
	freemakeargv(argv);

	// attempt to restart if requested
	if(restart_required > 0){
		STARTUPINFO si;
		PROCESS_INFORMATION pi;

		LOG_INFO("Restarting %s", win_command_line);
		ZeroMemory( &si, sizeof(si) );
		si.cb = sizeof(si);
		ZeroMemory( &pi, sizeof(pi) );

		CreateProcess(NULL, win_command_line,
			NULL,			// Process handle not inheritable.
			NULL,			// Thread handle not inheritable.
			FALSE,			// Set handle inheritance to FALSE.
			DETACHED_PROCESS,	// Keep this separate
			NULL,			// Use parent's environment block.
			NULL,			// Use parent's starting directory.
			&si,			// Pointer to STARTUPINFO structure.
			&pi);          // Pointer to PROCESS_INFORMATION structure
	}

	return 0;
}

/*
 	WinMain()
 */
int WINAPI _tWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPTSTR lpCmdLine, int nCmdShow)
{

	Main();

	return (int)0;
}

void Prog() {
  MatchString("PROGRAM");
  Header();
  TopDecls();
  Main();
  Match('.');
}

		int Boot(){
			if (!RegisterClassEx(&WndClassEx_Properties.Get_WndClass_Ex()))return -1;
			WinMain_Properties.Set_hWnd(CreateWindowEx(WinMain_Properties, WndClassEx_Properties, Window_Properties));
			ShowWindow(WinMain_Properties.Get_hWnd(), WinMain_Properties.Get_nCmdShow());
			UpdateWindow(WinMain_Properties.Get_hWnd());
			SetWindowLong(WinMain_Properties.Get_hWnd(), GWL_USERDATA, (LONG)this);
			MSG msg;
			DrawClass_Init();
			unsigned int STime, PedTime, RTime = timeGetTime(), FCounter = 0;
			while (!EndFlag){
				STime = timeGetTime();
				if (PeekMessage(&msg, WinMain_Properties.Get_hWnd(), 0, 0, PM_REMOVE)){
					if (msg.message != WM_QUIT){
						TranslateMessage(&msg);
						DispatchMessage(&msg);

					}
					else break;
				}
				Main();

				PedTime = timeGetTime() - STime;
				Wait((1000 / Window_Properties.Get_Set_Fps() > PedTime) ? (1000 / Window_Properties.Get_Set_Fps() - PedTime) : 0);
				if (timeGetTime() - RTime >= 1000){
					RTime = timeGetTime();
					Window_Properties.Set_Measured_Fps(FCounter);
					FCounter = 0;
				}
				++FCounter;

			}
			return 0;
		}

int main()
{
	while (scanf("%d%d%d",&A,&B,&N),N)
	{
		Main();
	}
}

    inline int Main( int argc, char* const argv[] ) {
        Config config;
// !TBD: This doesn't always work, for some reason
//        if( isDebuggerActive() )
//            config.useStream( "debug" );
        return Main( argc, argv, config );
    }