Calculator

// Win32Project1.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "Win32Project1.h" #define MAX_LOADSTRING 100 // Global Variables: HINSTANCE hInst; // current instance WCHAR szTitle[MAX_LOADSTRING]; // The title bar text WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name int xcoords [16]= {10,45,80,115,10,45,80,115,10,45,80,115, 10,45,80,115 }; int ycoords [16] = {40,40,40,40,75,75,75,75,110,110,110,110,145,145,145,145}; TCHAR * titles[16] = { L"0", L"1",L"2",L"3", L"4",L"5",L"6", L"7", L"8",L"9",L"C", L"=", L"+",L"-",L"*", L"/" }; // Forward declarations of functions included in this code module: 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: Place code here. // Initialize global strings LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); LoadStringW(hInstance, IDC_WIN32PROJECT1, szWindowClass, MAX_LOADSTRING); MyRegisterClass(hInstance); // Perform application initialization: if (!InitInstance (hInstance, nCmdShow)) { return FALSE; } HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_WIN32PROJECT1)); MSG msg; // Main message loop: while (GetMessage(&msg, nullptr, 0, 0)) { if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } return (int) msg.wParam; } // // FUNCTION: MyRegisterClass() // // PURPOSE: Registers the window class. // 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_WIN32PROJECT1)); wcex.hCursor = LoadCursor(nullptr, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_WIN32PROJECT1); wcex.lpszClassName = szWindowClass; wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL)); return RegisterClassExW(&wcex); } // // FUNCTION: InitInstance(HINSTANCE, int) // // PURPOSE: Saves instance handle and creates main window // // COMMENTS: // // In this function, we save the instance handle in a global variable and // create and display the main program window. // BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) { hInst = hInstance; // Store instance handle in our global variable 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; } // // FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM) // // PURPOSE: Processes messages for the main window. // // WM_COMMAND - process the application menu // WM_PAINT - Paint the main window // WM_DESTROY - post a quit message and return // // LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) { static HWND hEdit; static int firstNumber; static TCHAR oper; switch (message) { case WM_CREATE: hEdit = CreateWindow(L"EDIT", L"", WS_CHILD | WS_VISIBLE | WS_BORDER, 10, 2, 150, 30, hWnd, NULL, hInst, 0); for (int k = 0; k < 16; k++) { CreateWindow(L"Button", titles[k], WS_CHILD | WS_VISIBLE, xcoords[k], ycoords[k], 30, 30, hWnd, NULL, hInst, 0); } break; case WM_COMMAND: { int wmId = LOWORD(wParam); int wmEvent = HIWORD(wParam); if (wmEvent == BN_CLICKED) { TCHAR buf[32]; TCHAR c[2]; int secondNumber; GetWindowText((HWND)lParam, c, 2); switch (c[0]) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': GetWindowText((HWND)hEdit, buf, 32); wcscat_s(buf, c); SetWindowText((HWND)hEdit, buf); break; case 'c':SetWindowText((HWND)hEdit, L""); break; case '+': case '-': case '/': case '*': oper = c[0]; GetWindowText(hEdit, buf, 32); firstNumber = _wtoi(buf); SetWindowText(hEdit, L""); break; case'=': GetWindowText(hEdit, buf, 32); secondNumber = _wtoi(buf); switch (oper) { case '+': firstNumber = firstNumber + secondNumber; break; case '-': firstNumber = firstNumber - secondNumber; break; case '*': firstNumber = firstNumber * secondNumber; break; case '/': firstNumber = firstNumber / secondNumber; break; } _itow_s(firstNumber, buf, 10); SetWindowText(hEdit, buf); } } // Parse the menu selections: 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: { PAINTSTRUCT ps; HDC hdc = BeginPaint(hWnd, &ps); // TODO: Add any drawing code that uses hdc here... EndPaint(hWnd, &ps); } break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, message, wParam, lParam); } return 0; } // Message handler for about box. INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) { UNREFERENCED_PARAMETER(lParam); switch (message) { case WM_INITDIALOG: return (INT_PTR)TRUE; case WM_COMMAND: if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) { EndDialog(hDlg, LOWORD(wParam)); return (INT_PTR)TRUE; } break; } return (INT_PTR)FALSE; }