链表 创建-输入-输出-销毁

记录下踩的几个坑

1. scanf("%d-%s-%d", ... ... ...); 中间的字符串不好区分,会导致输入错误,改成了scanf("%d-%d-%s", ... ... ...); 还是分开输入比较好
2. CreateList(student **head);这里用二级指针(一级指针为局部变量),n=CreatList(&head);

struct student *head;
head->no head里面的量.输入要取地址
如:scanf("%d-%d-%s",&p2->no,&p2->score,&p2->name);

4. 链表创建有头插和尾插,这里用尾插但是保留头结点位置.
5. 代码:

#include <stdio.h>
#include <stdlib.h>

struct student
{
	int no;
    char name[9];
    int score;
    struct student *next;
};
//链表创建
int CreateList(student **head)
{
	int n;
	student *p1,*p2;
	int i=0;
	printf("number?");
	scanf("%d",&n);
	if(n<=0) return 0;
	else
	{
		*head=(struct student*)malloc(sizeof(student));
		(*head)->next=NULL;
		printf("data:%d no-score-name:\n",i+1);
		scanf("%d-%d-%s",&(*head)->no,&(*head)->score,&(*head)->name);
		p1=*head;
		for(i=1;i<n;i++)
		{
			p2=(struct student*)malloc(sizeof(student));
			p2->next=NULL;
			p1->next=p2;
			p1=p2;
			printf("data:%d no-name-score:\n",i+1);
			scanf("%d-%d-%s",&p2->no,&p2->score,&p2->name);
		}
		return n;
	} 
}
//链表销毁
int DestroyList(struct student *head)
{
	student *p1,*p2;
	p1=head;
	p2=p1;
	while(p2!=NULL)
	{
		p2=p1->next;
		free(p1);	
	}
	return p2==NULL?1:0;
} 
//输出
void OutList(student *head)
{
	student *p;
	p=head;
	printf("-----out--------\n");
	while(p!=NULL)
	{
		printf("no:%d name:%s score:%d \n",p->no,p->name,p->score);
		p=p->next;
	}
}

int main()
{
	student *head=NULL;
	int n=CreateList(&head);
	if(n==0)
	{
		printf("error!");
		return 0;	
	}
	printf("%s",head);
	OutList(head); 
	DestroyList(head); 
	return 0;
}