` /浮點數計PI(π): long double Pild = 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196; //輸出有效為： 3.141592653589793115997963468544185161590576171875 //有效位： 3.141592653589793 //等價 //PILD01=3.141592653589793; long double Pi2ld = 3.1415926535897932; ` 上個“調試”界面圖：  上一個“日志”界面：  ``` #include "stdafx.h" #include "Project1car181101.h" #include<iostream> #include<fstream> using namespace std; #define MAX_LOADSTRING 100 // 全局變量: HINSTANCE hInst; // 當前實例 WCHAR szTitle[MAX_LOADSTRING]; // 標題欄文本 WCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口類名 ofstream cou02t; // 此代碼模塊中包含的函數的前向聲明: ATOM MyRegisterClass(HINSTANCE hInstance); BOOL InitInstance(HINSTANCE, int); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM); int APIENTRY wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow) { UNREFERENCED_PARAMETER(hPrevInstance); UNREFERENCED_PARAMETER(lpCmdLine); // TODO: 在此處放置代碼。 //調用Console控制臺 ***AllocConsole(); #pragma warning(disable:4996) _tfreopen(TEXT("CONOUT$"), TEXT("w"), stdout); _tfreopen(TEXT("CONOUT$"), TEXT("w"), stderr); _tfreopen(TEXT("CONIN$"), TEXT("r"), stdin); #pragma warning(default:4996) _tsetlocale(LC_ALL, TEXT("chs"));*** //輸出到文檔(日志) cou02t.open("f://log181123car_cou02t181124a1.txt"); // 初始化全局字符串 LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); LoadStringW(hInstance, IDC_PROJECT1CAR181101, szWindowClass, MAX_LOADSTRING); MyRegisterClass(hInstance); // 執行應用程序初始化: if (!InitInstance (hInstance, nCmdShow)) { return FALSE; } HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_PROJECT1CAR181101)); MSG msg; // 主消息循環: while (GetMessage(&msg, nullptr, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } return (int) msg.wParam; } // // 函數: MyRegisterClass() // // 目標: 注冊窗口類。 // ATOM MyRegisterClass(HINSTANCE hInstance) { WNDCLASSEXW wcex; wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = WndProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_PROJECT1CAR181101)); wcex.hCursor = LoadCursor(nullptr, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_PROJECT1CAR181101); wcex.lpszClassName = szWindowClass; wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL)); return RegisterClassExW(&wcex); } // // 函數: InitInstance(HINSTANCE, int) // // 目標: 保存實例句柄并創建主窗口 // // 注釋: // // 在此函數中，我們在全局變量中保存實例句柄并 // 創建和顯示主程序窗口。 // BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) { hInst = hInstance; // 將實例句柄存儲在全局變量中 HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr); if (!hWnd) { return FALSE; } ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); return TRUE; } // // int setpixe02l(HDC hdc, int x1, int y1, COLORREF color1) { int y2 = 400 - y1; SetPixel(hdc, x1, y2, color1);//500-y1, color1); cou02t << "[y2:" << y2 << "]";// << endl; return 1; } //函數目標：處理圖像（重繪） int wm01paint01(HDC hdc) { int x01 = 100; int y01 = 50; for (int i = 1; i < 99; ++i) { int x02 = x01 + i; SetPixel(hdc, x01+i, y01+i , RGB(200, 0, 0));//Red色 setpixe02l(hdc, x01+i , y01+i , RGB(0,200, 0));//green色 cou02t << "[x02:" << x02 << "]";// << endl; }//for210i cout << "[x01:" << x01 << endl; return 1; } // // 函數: WndProc(HWND, UINT, WPARAM, LPARAM) // // 目標: 處理主窗口的消息。 // // WM_COMMAND - 處理應用程序菜單 // WM_PAINT - 繪制主窗口 // WM_DESTROY - 發送退出消息并返回 // // LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_COMMAND: { int wmId = LOWORD(wParam); // 分析菜單選擇: switch (wmId) { case IDM_ABOUT: DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About); break; case IDM_EXIT: DestroyWindow(hWnd); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } } break; case WM_PAINT: {//case110 PAINTSTRUCT ps; HDC hdc = BeginPaint(hWnd, &ps); // TODO: 在此處添加使用 hdc 的任何繪圖代碼... // wm01paint01(hdc); // EndPaint(hWnd, &ps); }//case110 break; case WM_DESTROY: ``` KBJFW-NXHK6-W4WJM-CRMQB-G3CDH（請比爾家恕俺貧窮不義,等俺把娃養大定當回報Micro$oft和IT社會）