new 高级用法

#include <iostream>
using namespace std;

class Person
{
public:
    Person()
    {
        cout << "构造函数" << endl;;
    }
    ~Person()
    {
        cout << "析构函数" << endl;
    }
};

int main()
{
    int *pStart = new int[1024];
    int *pEnd = pStart + 1024;
    cout << static_cast<void*>(pStart) << " " 
    << static_cast<void*>(pEnd) << endl;

    Person * japanese = new Person;
    cout << japanese << endl;

    Person *chinese = new Person;
    cout << chinese << endl;

    //将Person类对象限定在指针p指向的区域内
    //限定区域分配内存，覆盖模式

    Person * korean = new (pStart)Person;//korean 内存空间为起始地址为pStart
    cout << korean << endl; 
    //delete korean;//一般不需要delete,自动覆盖  
    Person *english = new (pStart +10)Person;//english内存空间起始地址为pStart +10*4
    cout << english << endl;
    cin.get();
    return 0;

}