int *pi = new int (6) // C++98
struct where {double x; double y; double z};
where * one = new where {2.5, 5.3, 7.2}; // C++11
#include<new>
char buffer[50]; char *p = new (buffer) char[50]; int *after = new int; int *q = new(after) int;
原文：https://www.cnblogs.com/suui90/p/12939698.html