Getting last element from vector

[beginrtos]

link_Node *pNode,*tempsegnode;; // here link_node is a class
vector<link_Node*> *pList;

pNode = (*pList)[i];

i want to find that a pNode is last in pList and if so i have to take some corrective measure.
i tried using end() API but not able to make it working

can someone help how to find last element from pList and then compare pNode and last element.

[beginrtos]

i had just started working in C++ and started modifying a code which make use of vectors.
please help me out with this.

link_Node *pNode,*tempsegnode;; // here link_node is a class
vector<link_Node*> *pList;

pNode = (*pList)[i];

i want to find that a pNode is last in pList and if so i have to take some corrective measure.
i tried using end() API but not able to make it working

in other words i need to know what is last element in vector list pList and compare with pNode and if they r same i need to do some processing.

can someone help how to find last element from pList and then compare pNode and last element.

[z05DSL3A]

I assume you want something along these lines:

#include <iostream>
#include <vector>
//-----------------------------------------------------------------------------
class link_Node 
{
    // Some stuff
};
//-----------------------------------------------------------------------------
int main() 
{
    link_Node *pNode       = 0;
    link_Node *tempsegnode = 0;

    std::vector< link_Node* > *pList;

    pList = new std::vector< link_Node* >;

    pList->push_back(new link_Node);

    pNode = (*pList)[0];

    if(pNode == pList->back())
    {
        std::cout <<"at end" << std::endl;
    }
    else
    {
        std::cout <<"not at end" << std::endl;
    }

    pList->push_back(new link_Node);

    if(pNode == pList->back())
    {
        std::cout <<"at end" << std::endl;
    }
    else
    {
        std::cout <<"not at end" << std::endl;
    }

    // TODO: Clean up code...

    return 0;
}

/* End of file ***************************************************************/

PS: Only post your question in one forum.

[beginrtos]

Thanks for your reply.

i did the same thing

link_Node *pSegNode,*temppp;
temppp = (*(pSegList)->end()-1);



printf(" name is %s",temppp->sGetName().c_str());

but i m getting the segmentation fault.

am i missing something here?

[z05DSL3A]

temppp = *(pSegList->end()-1); ??

[Lodger]

As Grey Wolf demonstrated in the sample code:

vector::back() will return a direct reference to the last element in your vector
http://www.cplusplus.com/reference/stl/vector/back/

vector::end() will return an iterator to the past-the-end element in your vector
http://www.cplusplus.com/reference/stl/vector/end/