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;
}