输入若干个学生的信息（学号、姓名、成绩），当输入学号为0时结束，用单向链表组织这些学生信息后，再按顺序输出。 输入样例: 1 zhang 78 2 wang 80 3 li 75 4 zhao 85 0 输出样例: 1 zhang 78 2 wang 80 3 li 75 4 zhao 85 用c语言程序写代码

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

struct student {
    int num;
    char name[20];
    int score;
    struct student* next;
};

int main() {
    struct student* head = NULL;
    struct student* p, *tail;
    int num, score;
    char name[20];

    while (1) {
        scanf("%d", &num);
        if (num == 0) {
            break;
        }
        scanf("%s%d", name, &score);

        p = (struct student*)malloc(sizeof(struct student));
        p->num = num;
        strcpy(p->name, name);
        p->score = score;
        p->next = NULL;

        if (head == NULL) {
            head = p;
            tail = p;
        } else {
            tail->next = p;
            tail = p;
        }
    }

    printf("学号\t姓名\t成绩\n");
    p = head;
    while (p != NULL) {
        printf("%d\t%s\t%d\n", p->num, p->name, p->score);
        p = p->next;
    }

    p = head;
    while (p != NULL) {
        tail = p->next;
        free(p);
        p = tail;
    }

    return 0;
}