结构体中含有char*类型

cin>>a.name; 是输入一串字符到a.name指向的内存中，但你的a.name指向哪里？

#include <iostream>
using namespace std;
#include "string.h"
#include "stdlib.h"
struct Student
{
    char *name;
    int age;
    int height;
};

void massage_i(Student &a)
{
    char *name_p;
    cout<<"name:";
    cin>>name_p;
    cout<<"age:";
    cin>>a.age;
    cout<<"height:";
    cin>>a.height;
    if(strdup(name_p)==NULL)
       cout<<"error";
    else
      a.name=strdup(name_p);
}

void display(Student temp)
{
    cout<<temp.name<<"\t"<<temp.age<<"\t"<<temp.height;
     free(temp.name);
}

int main()
{
    Student stu；
    massage_i(stu);
    display(stu);
    return 0;
}

怎么还是这样？