求解一个关于结构的问题

-------总是编辑不出结果
  看不明白这几个字是啥意思

#include <string.h>
#include <stdlib.h>
#include "stdafx.h"
#include "iostream"
using namespace std;

struct pimpl
 {
     char *m_name;
     int m_age;
 };
class student
 {
private:
     pimpl m_pimpl;
public:
     student(char *name,int age)
     {
       m_pimpl.m_name = name;
         //m_pimpl.m_name = new char[strlen(name)];
        // memcpy(m_pimpl.m_name,name,strlen(name));
         m_pimpl.m_age = age;
     }
     ~student()
     {
         if (m_pimpl.m_name)
         {
             delete m_pimpl.m_name;
             m_pimpl.m_name = NULL;
         }
     }
     void show();
 };
void student::show()
 {
cout<<"姓名 :"<<m_pimpl.m_name<<endl;
cout<<"年龄 :"<<m_pimpl.m_age<<endl;
 }
int main()
 {
     char szStr[] = "谢谢";
     student a1(szStr,24);
     a1.show();
     return 0;
 }
3楼的代码稍加修改，如上也可以运行，且输出结果没有出现特殊字符，有什么区别呢？