C++ 重载new和delete

下边代码对new和delete进行了简单的重载：

#include <memory>
#include <iostream>
#include <cstddef>
using namespace std;
class TraceHeap
{
    int i;
public:
    static void* operator new(size_t siz)
    {
        void* p = ::operator new(siz);
        cout << "Allocating TraceHeap object on the heap "
            << "at adress " << p << endl;
        return p;
    }
    static void operator delete(void* p)
    {
        cout << "Deleting TraceHeap object at address "
            << p <<endl;
        ::operator delete(p);
    }

    TraceHeap(int i) : i(i) {}
    int getVal()  const { return i; }
};
int main()
{
    auto_ptr<TraceHeap> pMyObject(new TraceHeap(5));
    cout << pMyObject->getVal() << endl;    // Pringts 5
    getchar();
}

运行结果：