请问C++中结构体string赋值问题，求大神

[qq_38929113]

请问这段代码在运行时会出错，原因应该在注释的地方，求解答

#include <stdlib.h>
#include <iostream>  
#include <cstring>  
using namespace std;  

typedef struct 
{
	string words;
	int times;
}DATA;

typedef struct node
{
	DATA data;
	struct node *next;
}linknode,*link;

int main()
{
	link p=NULL;
	p->data.words="1234";   //这里为什么不可以
	cout<<p->data.words;
	return 0;
}

[sdghchj]

p is nullptr pointer, pointed to no object member of whom you are accessing

[zgl7903]

p = NULL; p-> 不能访问空指针 p = new xxxxx ; p->xxxx delete p;