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pointer pointer

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Can some one give me a good use for pinter pointers? Besides strings ( char * ).

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The example is not usefull in any way... but shows
how you can use a double pointer.

int iMaxElements=32;
int** ppIntPointerList;

ppIntPointerList=new int*[iMaxElements];

for (int i=0;i{
ppIntPointerList=new int;
*ppIntPointerList[i]=i;
}

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vector intPtrVec;

intPtrVec.erase( &intPtrVec[1] ); <-- &intPtrVec[1] is the address of a pointer; that is; a pointer to a pointer.

(It's killing my braces. :/ 'Vector(lessthen)int*(greaterthen) intPtrVec

You use pointers to pointers when you need to manipulate the pointer like a regular value, or need it to be treated as the value rather then the address of one.

Also; that code causes a memory leak. The pointer to the int is erased, but the int itself is never deleted.


[edited by - deyja on August 13, 2002 9:56:27 AM]

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