CObArray::SetAt

Статья
10/16/2008

Sets the array element at the specified index.

void SetAt(
   INT_PTR nIndex,
   CObject* newElement 
);

Параметры

nIndex
An integer index that is greater than or equal to 0 and less than or equal to the value returned by GetUpperBound.
newElement
The object pointer to be inserted in this array. A NULL value is allowed.

Заметки

SetAt will not cause the array to grow. Use SetAtGrow if you want the array to grow automatically.

You must ensure that your index value represents a valid position in the array. If it is out of bounds, then the Debug version of the library asserts.

The following table shows other member functions that are similar to CObArray::SetAt.

Class	Member Function
CByteArray	void SetAt( INT_PTRnIndex, BYTE newElement );
CDWordArray	void SetAt( INT_PTRnIndex, DWORD newElement );
CPtrArray	void SetAt( INT_PTRnIndex, void* newElement );
CStringArray	void SetAt( INT_PTRnIndex, LPCTSTR newElement );
CUIntArray	void SetAt( INT_PTRnIndex, UINT newElement );
CWordArray	void SetAt( INT_PTRnIndex, WORD newElement );

Пример

See CObList::CObList for a listing of the CAge class used in all collection examples.

CObArray arr;
CObject* pa;

arr.Add(new CAge(21)); // Element 0
arr.Add(new CAge(40)); // Element 1
if ((pa = arr.GetAt(0)) != NULL)
{
   arr.SetAt(0, new CAge(30));  // Replace element 0.
   delete pa; // Delete the original element at 0.
}
#ifdef _DEBUG
   afxDump.SetDepth(1);
   afxDump << _T("SetAt example: ") << &arr << _T("\n");
#endif

The results from this program are as follows:

SetAt example: A CObArray with 2 elements

[0] = a CAge at $47E0 30

[1] = a CAge at $47A0 40