当年所谓不解决的动态链表问题，再次回顾，呵呵

#include<stdio.h> 

 #include<malloc.h> 

 #define NULL 0 

 #define LEN  sizeof(struct student) 



 typedef struct student 

 { 

long num; 

float score; 

struct student *next; 

 }student; 



 int n; 

 int main() 

 { 

student *head; 

student 
  *p1,*p2; 



//printf("sizeof is %d",sizeof(head));  果然不管如何指针都是四个字节的大小的存在 



n = 0; 

p1 = p2 = (student *)malloc(LEN); 

scanf("%ld,%f",&p1->num,&p1->score); 

head = NULL; 

while(p1->num != 0) 

{ 

n = n+1; 

if(n == 1) 

head = p1; 

else 

p2->next = p1; 

p2 = p1; 

p1 = (student *)malloc(LEN); 

scanf("%ld,%f",&p1->num,&p1->score); 

} 

return 0; 

 }