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:
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