이 함수에 문제가 있나요?

#include <stdio.h>
#include <sstream>
#include <vector>
#include <list>
 
 
using namespace std;
 
list<int*> objList;
 
class CTest
{
public:
    CTest(){}
    ~CTest(){}
 
    void drawView();
};
 
class GLObject
{
public:
    GLObject(){}
    ~GLObject(){}
 
    void draw()
    {
        printf("-----------\n");
    }
};
 
void CTest::drawView() 
{
	static int prevSize = 0;
	static int size = 0;
	list< int* >::iterator obj_iterPos = objList.begin();
	list< int* >::iterator obj_iterEnd = objList.end();
 
	for (; obj_iterPos != obj_iterEnd; obj_iterPos++)
        {
		size = objList.size();
		if (size != prevSize) 
                {
                        printf("xxxx\n");
			obj_iterPos = objList.begin();
			obj_iterEnd = objList.end();
			prevSize = size;
		}
		if (((GLObject*)(*obj_iterPos)) != NULL) ((GLObject*)(*obj_iterPos))->draw();
	}
}
 
int main()
{
    GLObject * o1 = new GLObject();
    objList.push_back((int*)o1);
 
    GLObject * o2 = new GLObject();
    objList.push_back((int*)o2);
 
    GLObject * o3 = new GLObject();
    objList.push_back((int*)o3);
 
    CTest ct;
    ct.drawView();
 
    o3 = (GLObject *) objList.back();
    objList.pop_back();
 
    o2 = (GLObject *) objList.back();
    objList.pop_back();
 
    o1 = (GLObject *) objList.back();
    objList.pop_back();
 
    delete o3;
    delete o2;
    delete o1;
 
    return 0;
}
 
//
xxxx
-----------
-----------
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