布局new操作符

 

布局操作符：指定变量的存储位置。

 

#include<iostream>
//#include<climits>
#include "stdafx.h"
//#include<cmath>
//#include<fstream>
//#include<cstdlib>
//#include<string>
#include<new>



using namespace std;

const int p = 100;
double* ptr = new double [p];

int main()
{
    double* pp;
    pp = new (ptr) double[12];
    //pp = new double[12];
    for (int i = 0;i < 12;i++)
    {
        cout << "every element contain value: " << ":";
        pp[i] = i * 2 + 10;
        cout << pp[i] << endl;

    }
    delete[] pp;
    system("pause");
    return 0;
}