#include <iostream>
#include <cstring>
using namespace std;
struct STRUCT
{
  string hello;
};
int main()
{
  STRUCT *str=new STRUCT;
  str->hello="Hello";//或者可以写成: (*str).hello="Hello"
  cout<<str->hello<<endl;//或者可以写成: cout<<(*str).hello<<endl;
  delete str;
  return 0;
}

#include <iostream>
#include <cstring>
using namespace std;
class CLASS
{
public:
  string hello;
};
int main()
{
  CLASS *str=new CLASS;
  str->hello="Hello";//同理
  cout<<str->hello<<endl;//同理
  delete str;
  return 0;
}