模拟链表

include <stdio.h>

include <malloc.h>

include <stdlib.h>

define LEN sizeof(struct student) // student结构的大小

struct student *creat(); //创建链表
void print(struct student *head); //打印链表

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;

stu = creat();
print( stu );

printf("\n\n");
system("pause");
}

struct student *creat()
{
struct student *head;
struct student *p1, *p2;

p1 = p2 = (struct student *)malloc(LEN); // LEN是student结构的大小

printf("Please enter the num 😊;
scanf("%d", &p1->num);
printf("Please enter the score 😊;
scanf("%f", &p1->score);

head = NULL;
n = 0;

while( 0 != 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( NULL != head )
{
do
{
printf("学号为 %d 的成绩是: %f\n", p->num, p->score);
p = p->next;
}while( NULL != p );
}
}