C++拾遗--定位new表达式
new表达式，默认下把内存开辟到堆区。使用定位new表达式，可以在指定地址区域(栈区、堆区、静态区)构造对象，这好比是把内存开辟到指定区域。
#include <iostream>
using namespace std;
char addr1[100];
int main()
{
cout << "******定位new表达式演示***by David***" << endl;
char addr2[100];
char *addr3 = new char[100];
cout << "addr1 = " << (void*)addr1 << endl;
cout << "addr2 = " << (void*)addr2 << endl;
cout << "addr3 = " << (void*)addr3 << endl;
int *p = nullptr;
//把内存分配到静态区
p = new(addr1)int;
*p = 1;
cout << (void*)p << " " << *p << endl;
//把内存分配到栈区
p = new(addr2)int;
*p = 2;
cout << (void*)p << " " << *p << endl;
//把内存分配到堆区
p = new(addr3)int;
*p = 3;
cout << (void*)p << " " << *p << endl;
cin.get();
return 0;
}运行
原文：http://blog.csdn.net/zhangxiangdavaid/article/details/43899351