C / C++ / MFC

node a(3); // a, will be deleted as a stack variable
a.next = new node(4); // b, will be deleted by unique_ptr of a
a.next->next = new node(5); // c, will be deleted by unique_ptr of b
// 1. deleting of b, not "tested" :) :
a.next = move(a.next->next); // is there a crash ?
// 2. then deleting of b, old style :) :
unique_ptr<node> temp = move(a.next->next);
a.next = move(temp);

struct node {
  int m_iData;
  node* m_pNext;

  node(int iData) : m_iData(iData), m_pNext(NULL) {}
  ~node() { delete m_pNext; }

  node* detach() { node* prevNext(m_pNext); m_pNext = NULL; return prevNext; }
} a(3);

They sought it with thimbles, they sought it with care;
They pursued it with forks and hope;
They threatened its life with a railway-share;
They charmed it with smiles and soap.

a.next = b;

thandy mitchell wrote:

can you please provide me with the algorithm on how to go about doing this work

1. Using Excel Automation (COM / OLE Dispatch) with the Excel type library. This requires an installed Excel on the machine running your application (which defines what Excel file versions can be read) and the Excel type library on the development machine.
2. Using ODBC or ADO (OLE DB). These are database interfaces that handle sheets from Excel files like databases tables. Drivers for XLS files are present on all Windows systems. Drivers for XLSX files are installed by Office 2007 or with the 'Microsoft Access Database Engine 2010 Redistributable' package.
3. Using a library. Examples are the ExcelFormat Library[^] here at CodeProject and the commercial LibXL[^] library.

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