不知道怎么了
#include<stdio.h>#include<malloc.h>
#include<stdlib.h>
#define LEN sizeof(struct student) //student结构的大小
struct student *creat();
struct student *del(struct student *head,int num);//del函数用于删除结点，*head及链表的头指针，num 是要删除的对象
void print(struct student *head);
struct student
{
int num;
float score;
struct student *next;
};
int n; //全局变量，用来记录存放了多少数据
void main()
{
struct student *stu, *p;
int n;
stu = creat();
p = stu;
print(p);
printf("Please enter the num to delete: ");
scanf("%d",&n);
print( del (p,n) );
printf("\n\n");
system("pause");
}
struct student *creat()
{
struct student *head;
struct student *p1,*p2;
p1 = p2 = (struct student *)malloc(LEN);
printf("Please enter the num:");
scanf("%d",&p1->num);
printf("Please enter the score:");
scanf("%f",&p1->score);
head = NULL;
n = 0;
while (p1-> num)
{
n++;
if(1 == n)
{
head = p1;
}
else
{
p2->next = p1;
}
p2=p1;
p1=(struct student *)malloc(LEN);
printf("\nPlease enter the num:");
scanf("%d",&p1->num);
printf("Please enter the score:");
scanf("%f",&p1->score);
}
p2->next = NULL;
return head;
}
void print(struct student *head)
{
struct student *p;
printf("\nThere are %d records!\n\n",n);
p=head;
if(head)
{
do
{
printf("学号为%d的成绩是:%f\n",p->num,p->score);
p = p->next;
}while(p);
}
struct student *del(struct student *head,int num)
{
struct student *p1,*p2;
if(NULL == head)
{
printf("\nThis list is null!\n");
goto end;
}
p1 = head;
while(p1 -> num!= num && p1->next !=NULL)
{
p2 = p1;
p1 = p1->next;
}
if(num == p1->num)
{
if(p1 == head) //当要删除的结点位于有结点的时候
{
head = p1->next;
}
else //一般情况
{
p2->next = p1->next;
}
printf("\nDelete NO:%d succeed!\n",num);
n = n-1; //n 是作为一个全局变量，用来记录链表的数据数
}
else
{
printf("%d not been found!\n",num);
}
END:
return head;
} 问题描述没有，报错信息也没有？ 我改好了少个}
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