验证vector变量是在内存中怎么分配的

#include<iostream>
#include <vector>
using namespace std;

class A {
public:
	A (int i = 0) : m_i (i) {
		cout << "无参构造：" << this << endl;
	}
	A (const A& that) : m_i (that.m_i) {
		cout << "拷贝构造：" << &that << "->" << this
			<< endl;
	}
	A& operator= (const A& that) {
		cout << "拷贝赋值：" << &that << "->" << this
			<< endl;
		if (&that != this)
			m_i = that.m_i;
		return *this;
	}
	~A (void) {
		cout << "析构函数：" << this << endl;
	}
private:
	int m_i;
};
int main (void) {

	vector<A> va (3);
	return 0;
	}