全局new和宏结合起来的一个小应用

 #include <iostream>
 using namespace std;

 void* operator new(size_t size, const char* file, int line)
 {
     cout << file << " : " << line << endl;
     cout << "size : " << size << endl;
     return ::new char[size];
 }
 #define new new(__FILE__,__LINE__)

 int main()
 {
     int* a = new int;
     delete a;
 }