求助free问题
/*收集电影名并打分*/#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define TSIZE 45
struct film{
char title[TSIZE];
int rating;
struct film *next;
};
int main()
{
struct film *head=NULL;
struct film *prev,*current;
char input[TSIZE];
/*收集并存储信息*/
puts("Enter first movie title");
while(gets(input)!=NULL&&input[0]!='\0')
{
current=(struct film *)malloc(sizeof(struct film ));
if(head==NULL)
head=current;
else
prev->next=current;
current->next=NULL;
strcpy(current->title,input);
puts("Enter your rating <0-10>: ");
scanf("%d",¤t->rating);
while(getchar()!='\n')
continue;
puts("Enter next movie title (empty line to stop): ");
prev=current;
}
/* 给出电影列表*/
if(head=NULL)
printf("NO data entered. ");
else
printf("Here is the movie list: \n");
current=head;
while(current!=NULL)
{
printf("MOvie : %s Rating : %d\n",current->title,current->rating);
current=current->next;
}
/* 任务完成,因此释放所分配的内存*/
current=head;
while(current!=NULL)
{
free(current);
current=current->next;
}
printf("Bye!\n");
return 0;
}
为什么free(current);释放了还能得到current=current->next;地址啊