#include 
    
     class A{public:	int i;public:	void* operator new (size_t a, size_t b)	{		std::cout << "a: " << a << ",b: " << b << std::endl;		return NULL;	}};int main(){	A *pInt = NULL;	pInt = new (10)A;        return 0;}
    

Result of ouput:

PS:

    还可以有多个参数：void* operator new (size_t classSize, int paraA, int paraB, int paraC);

    写法： ClassA *pClassA = new (paraA, paraB, paraC)ClassA;