关于vector存指针的问题

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

int main()
{
    char* ia[]={"marry","mirst","vector","list"};
    list<char*> lst(ia,ia+4);
    vector<string> vec;

    for(list<char*>::iterator it=lst.begin();it!=lst.end();it++)
    {
        string str;
        str=**it;
        cout<<"*it : "<<**it<<endl;
        vec.push_back(str);        
    }
   
    for(vector<string>::iterator it=vec.begin();it!=vec.end();it++)
    {
        cout<<"it : "<<*it<<endl;
    }
   
    return 0;
}