void lianbiao(struct student *head) { FILE *fp; struct student *p1, *q1; q1 = head; if ((fp = fopen("duli16.3.dat", "r")) == NULL) { printf("File open error!\n"); return; } while (1) { p1 = (struct student *)malloc(sizeof(struct student)); if((fscanf(fp, "%s %s %lf", p1->num, p1->name, &p1->money)) ==-1){ break; }; // printf("%s\n",p1->num); p1->next = NULL; q1->next = p1; q1 = p1; } q1->next = NULL; fclose(fp); // printf("111\n"); }

lianbiao函数的作用是从文件"duli16.3.dat"中读取学生信息，存储到链表中。具体实现代码如下：

void lianbiao(struct student *head) {
    FILE *fp;
    struct student *p1, *q1;
    q1 = head;
    if ((fp = fopen("duli16.3.dat", "r")) == NULL) {
        printf("File open error!\n");
        return;
    }
    while (1) {
        p1 = (struct student *)malloc(sizeof(struct student));
        if((fscanf(fp, "%s %s %lf", p1->num, p1->name, &p1->money)) ==-1){
            break;
        };
        p1->next = NULL;
        q1->next = p1;
        q1 = p1;
    }
    q1->next = NULL;
    fclose(fp);
}

dayin函数的作用是遍历链表，输出学生信息。具体实现代码如下：

void dayin(struct student *head) {
    struct student *p;
    p = head->next;
    while (p != NULL) {
        printf("%s %s %lf\n", p->num, p->name, p->money);
        p = p->next;
    }
}