C語言實現的鏈表結構

最近沒事學學C語言的編程,通過指針編寫了一個鏈表結構,代碼比較簡單,不做介紹,詳細代碼如下:

/* 
 * File:   main.c
 * Author: wuguowei
 *
 * Created on 2015年2月12日, 上午11:54
 */

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


#define LEN sizeof(struct Student)

struct Student {
    long num;
    float score;
    struct Student *next;
};


int n;

struct Student * create(void) {
    struct Student *head;
    struct Student *p1, *p2;
    n = 0;
    p1 = p2 = (struct 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 = (struct Student *) malloc(LEN);
        scanf("%ld,%f", &p1->num, &p1->score);
    }
    p2->next = NULL;
    return head;

}

void print(struct Student *head) {

    struct Student *p;
    printf("\nNow,These %d records are:\n", n);
    p = head;
    if (head != NULL) {
        do {
            printf("%ld %5.1f\n", p->num, p->score);
            p = p->next;
        } while (p != NULL);

    }
}

/*
 * 
 */
int main(int argc, char** argv) {
    struct Student * pt;
    pt = create();

    print(pt);

    return (EXIT_SUCCESS);
}

輸入:
1001,89.3
1002,99
1003,79.4
1004,99.8
0,0

Now,These 4 records are:
1001  89.3
1002  99.0
1003  79.4
1004  99.8

運行 FINISHED; 退出值0; 實時:  37s; 用戶:  0ms; 系統:  0ms