C++类中vector成员变量的拷贝

问题描述：

在使用过程中，遇到指针的问题；简要概括为：初始化中的指针和使用的指针不同；

#include <iostream>
#include <boost/format.hpp>
#include <vector>

class A {
    typedef struct {
        std::vector<std::string> vec_;
    } PhaseVecAndIter;
public:
    PhaseVecAndIter getPhaseVec() {
        return pv_;
    }
    void init() {
        std::vector<std::string> vec;
        vec.push_back("string1");
        vec.push_back("string2");
        pv_.vec_ = vec;
        std::cout << "init vector pointer:"<<&(*(pv_.vec_.begin())) << std::endl;
    }
private:
    PhaseVecAndIter pv_;
};
class B {
public:
    void setA(boost::shared_ptr<A> a) {
        a_ = a;
    }
    boost::shared_ptr<A> getA() {
        return a_;
    }
private:
    boost::shared_ptr<A> a_;
};
int main()
{
    boost::shared_ptr<A> a(new A());
    a->init();
    std::cout << "1:vector pointer:"<<&(*(a->getPhaseVec().vec_.begin())) << std::endl;

    B* b = new B();
    b->setA(a);

    boost::shared_ptr<A> c = b->getA();
    std::cout << "2:vector pointer:"<<&(*(c->getPhaseVec().vec_.begin())) << std::endl;
}