base pointer question

[mickey]

Sorry, debugger show the content of pvec right all the time; this is the complete code:

vector<int*>* pvec = new vector<int*>();
	{
	int ten=10, twenty=20, thirty=30;
	int *pten = &ten;
	//int* pten = new int(ten);  
	int* ptwenty = &twenty;
	int* pthirty = &thirty;	
		pvec->push_back(pten);
		pvec->push_back(ptwenty);
		pvec->push_back(pthirty);
	}	
 
	*(*pvec)[0] = 99; //no problems
	int q = 1000;
	(*pvec)[0] = &q;
	vector<int*>::iterator it;
	for(it=pvec->begin(); it != pvec->end(); ++it) {
		cout << "*it " << *(*it) << "	";
	}
	//delete (*pvec)[0];  
	delete pvec;

vector<int*>* pvec = new vector<int*>();
	{
	int ten=10, twenty=20, thirty=30;
	int *pten = &ten;
	//int* pten = new int(ten);  
	int* ptwenty = &twenty;
	int* pthirty = &thirty;	
		pvec->push_back(pten);
		pvec->push_back(ptwenty);
		pvec->push_back(pthirty);
	}	
	
	*(*pvec)[0] = 99; //no problems
	int q = 1000;
	(*pvec)[0] = &q;
	vector<int*>::iterator it;
	for(it=pvec->begin(); it != pvec->end(); ++it) {
		cout << "*it " << *(*it) << "	";
	}
	//delete (*pvec)[0];  
	delete pvec;

To copy to clipboard, switch view to plain text mode 

Obviously ten will be destroyed out the scope but out of it (*pvec)[0] still contains the number 10 (and debugger show that this pointer doens't change....)
I'm sorry but could you explain me more? thanks