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  1. #include <Windows.h>
  2. #include <math.h>
  3. #define ID_TIMER 1
  4.  
  5. LRESULT CALLBACK WndProc(HWND , UINT , WPARAM , LPARAM );
  6. void WINAPI Rotate(POINT arr[5]);
  7.  
  8. int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int cmdShow)
  9. {
  10.     TCHAR szAppName[] = TEXT("HelloWin32");
  11. 	HWND hWnd;
  12. 	MSG msg;
  13. 	WNDCLASS wndClass;
  14. 	wndClass.style = CS_HREDRAW | CS_VREDRAW;
  15. 	wndClass.lpfnWndProc = WndProc;
  16. 	wndClass.cbClsExtra = wndClass.cbWndExtra = 0;
  17. 	wndClass.hInstance = hInstance;
  18. 	wndClass.hIcon = LoadIcon(0, IDI_APPLICATION);
  19. 	wndClass.hCursor = LoadCursor(0, IDC_ARROW);
  20. 	wndClass.hbrBackground = (HBRUSH) GetStockObject(1);
  21. 	wndClass.lpszMenuName = 0;
  22. 	wndClass.lpszClassName = szAppName;
  23.  
  24. 	if (!RegisterClass(&wndClass))
  25. 	{
  26. 		MessageBox(0, TEXT("Failed to register window class"), TEXT("Error"), MB_OK | MB_DEFBUTTON1 | MB_ICONERROR);
  27. 		return 1;
  28. 	}
  29. 	hWnd = CreateWindow(szAppName, TEXT("Hello World Win32!!"), WS_OVERLAPPEDWINDOW,
  30. 		CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
  31. 		NULL, NULL, hInstance, NULL);
  32. 	if (!hWnd)
  33. 	{
  34. 		MessageBox(NULL, TEXT("Failed to create the window"), TEXT("Win32 Error"), MB_ICONERROR);
  35. 		return 1;
  36. 	}
  37. 	SetTimer(hWnd, ID_TIMER, 400, NULL);
  38.  
  39. 	ShowWindow(hWnd, cmdShow);
  40. 	UpdateWindow(hWnd);
  41.  
  42. 	while (GetMessage(&msg, NULL, 0, 0))
  43. 	{
  44. 		TranslateMessage(&msg);
  45. 		DispatchMessage(&msg);
  46. 	}
  47. 	return msg.wParam;
  48. }
  49.  
  50. LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM w, LPARAM l)
  51. {
  52. 	static HDC hdc;
  53. 	static PAINTSTRUCT ps;
  54. 	static POINT arr[5];
  55. 	static int i;
  56. 	static RECT rect;
  57. 	switch (message)
  58. 	{
  59. 	case WM_CREATE:
  60. 		GetClientRect(hWnd, &rect);
  61. 		arr[0].x = 200;
  62. 		arr[0].y = 100;
  63. 		arr[1].x = 100;
  64. 		arr[1].y = 100;
  65. 		arr[2].x = 100;
  66. 		arr[2].y = 200;
  67. 		arr[3].x = 200;
  68. 		arr[3].y = 200;
  69. 		arr[4].x = arr[0].x;
  70. 		arr[4].y = arr[0].y;
  71. 		return 0;
  72. 	case WM_TIMER:
  73. 		Rotate(arr);
  74. 		InvalidateRect(hWnd, &rect, TRUE);
  75. 		return 0;
  76. 	case WM_DESTROY:
  77. 		KillTimer(hWnd, ID_TIMER);
  78. 		PostQuitMessage(0);
  79. 		return 0;
  80. 	case WM_PAINT:
  81. 		hdc = BeginPaint(hWnd, &ps);
  82. 		MoveToEx(hdc, arr[0].x, arr[0].y, NULL);
  83. 		for (i = 1; i < 5; ++i) LineTo(hdc, arr[i].x, arr[i].y);
  84. 		EndPaint(hWnd, &ps);
  85. 		return 0;
  86. 	case WM_SIZE:
  87. 		GetClientRect(hWnd, &rect);
  88. 		return 0;
  89. 	default:
  90. 		return DefWindowProc(hWnd, message, w, l);
  91. 	}
  92. }
  93.  
  94. void WINAPI Rotate(POINT arr[5])
  95. {
  96. 	static const POINT origin = { 150, 150 };
  97. 	static int i;
  98. 	static const double angle = 0.1;
  99. 	static const int direction = 1; // 1 or -1
  100. 	for (i = 0; i < 5; ++i)
  101. 	{
  102. 		arr[i].x -= origin.x;
  103. 		arr[i].y -= origin.y;
  104. 		arr[i].x = arr[i].x * cos(angle)				 - direction * arr[i].y * sin(angle);
  105. 		arr[i].y = direction * arr[i].x * sin(angle)	 + arr[i].y * cos(angle);
  106. 		arr[i].x += origin.x;
  107. 		arr[i].y += origin.y;
  108. 	}
  109. }
  110.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:1:21: error: Windows.h: No such file or directory
prog.cpp:5: error: ‘LRESULT’ does not name a type
prog.cpp:6: error: expected initializer before ‘Rotate’
prog.cpp:8: error: expected initializer before ‘WinMain’
stdout
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Standard output is empty
https://ideone.com/bWtQcZ
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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