C / C++ / MFC

// bluatigro 23 okt 2017
// win game 1

#if defined(UNICODE) && !defined(_UNICODE)
    #define _UNICODE
#elif defined(_UNICODE) && !defined(UNICODE)
    #define UNICODE
#endif

#include <tchar.h>
#include <windows.h>

bool key[ 256 ] ;
int playerx , playery , winx , winy ;
#define FRAME_TIMER 1

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp");

int WINAPI WinMain (HINSTANCE hThisInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR lpszArgument,
                     int nCmdShow)
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default colour as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           _T("Game 1"),       /* Title Text */
           WS_OVERLAPPEDWINDOW | WS_MAXIMIZE , /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           800,                 /* The programs width */
           600,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nCmdShow);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd,
  UINT message, WPARAM wParam, LPARAM lParam)
{
  switch (message)                  /* handle the messages */
  {
    case WM_CREATE :
      playerx = 100 ;
      playery = 100 ;
      SetTimer( hwnd
      , FRAME_TIMER
      , 40 , NULL ) ;
      break ;
    case WM_KEYDOWN :
      key[ wParam ] = true ;
      switch( wParam )
      {
        case VK_ESCAPE :
          PostQuitMessage( 0 ) ;
          break ;
        default : ;
      }
      break ;
    case WM_KEYUP :
      key[ wParam ] = false ;
      break ;
    case WM_TIMER :
      switch( wParam )
      {
        case FRAME_TIMER :
          if ( key[ VK_UP ] ) playery-- ;
          if ( key[ VK_DOWN ] ) playery++ ;
          if ( key[ VK_LEFT ] ) playerx-- ;
          if ( key[ VK_RIGHT ] ) playerx++ ;

          if ( playery > winy ) playery = 0 ;
          if ( playery < 0 ) playery = winy ;
          if ( playerx > winx ) playerx = 0 ;
          if ( playerx < 0 ) playerx = winx ;
          InvalidateRect( hwnd , NULL , true ) ;
        break ;
        default : ;
      }
      break ;
    case WM_PAINT :
      PAINTSTRUCT paint ;
      HDC hdc = BeginPaint( hwnd , &paint ) ;
      RECT rect ;
      GetClientRect( hwnd , &rect ) ;
      winx = rect.right ;
      winy = rect.bottom ;
/*
      HPEN pen = CreatePen( PS_SOLID ,
        1 , RGB( 255 , 255 , 0 ) ) ;
      HBRUSH brush =
        CreateSolidBrush( RGB( 255 , 255 , 0 ) ) ;
*/
      Ellipse( hdc ,
               playerx - 20 ,
               playery - 20 ,
               playerx + 20 ,
               playery + 20 ) ;

      EndPaint( hwnd , &paint ) ;
      break ;
    case WM_DESTROY :
      PostQuitMessage( 0 ) ;       /* send a WM_QUIT to the message queue */
      break ;
    default :                      /* for messages that we don't deal with */
      return DefWindowProc (hwnd, message, wParam, lParam);
  }

  return 0 ;
}

pRs->GetFieldValue(i, *pDBVariant);

CString CMyDoc::FormatData(CDBVariant* pDBVariant)
{
	CString sRet;

	do
	{
		if(NULL == pDBVariant)
			break;
		switch(pDBVariant->m_dwType)
		{
		case DBVT_LONG:
			TRACE("DBVT_LONG\n");
			sRet.Format(_T("%d"), pDBVariant->m_lVal);
			break;
		case DBVT_DOUBLE:
			TRACE("DBVT_DOUBLE\n");
			break;
		case DBVT_SHORT:
			TRACE("DBVT_SHORT\n");
			break;
		case DBVT_SINGLE:
			TRACE("DBVT_SINGLE\n");
			break;
		case DBVT_STRING:
			TRACE("DBVT_STRING\n");
			break;
		case DBVT_ASTRING:
			TRACE("DBVT_ASTRING\n");
			sRet = *pDBVariant->m_pstring;
			break;
		case DBVT_DATE:
			TRACE("DBVT_DATE\n");
			break;
		case DBVT_WSTRING:
			TRACE("DBVT_WSTRING\n");
			CStringW wstring = *pDBVariant->m_pstringW;
			sRet = CString(wstring);
			break;
		}
	}
	while(FALSE);

	return sRet;
}

SELECT nUser FROM my_table;

SELECT dVAT FROM my_table;

SELECT sName FROM my_table;

The carpenter manufactures chairs and tables. He can sell them on the market, each table for Pt EUR and each chair for Pc EUR. He needs A hours and B wooden planks to produce one table and C hours and D planks for one chair. His weekly workload cannot be higher than H hours. His weekly supply for planks is S. The carpenter cannot store the planks. Help the carpenter to prepare his weekly schedule that maximizes his income. Design an algorithm that accepts A, B, C, D, H, S, Pt, Pc as an input and tells how many chairs and how many tables the carpenter should produce weekly, and what is the income assuming this production plan. 

I haven't even got a clue... Can anyone please help?