请用c语言实现两个函数，一个将输入的学生成绩组织成单向链表；另一个将成绩低于某分数线的学生结点从链表中删除。

好的，很高兴能够回答你的问题。以下是 C 语言实现两个函数的代码:

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

// 定义学生结构体
typedef struct student {
    int num;
    char name[20];
    int score;
    struct student *next;
} Student;

// 将输入的学生成绩组织成单向链表
Student *createLinkedList() {
    Student *head = NULL, *node = NULL, *last = NULL;
    int num, score;
    char name[20];

    printf("请输入学生的学号、姓名和成绩，以-1结束\n");

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

        node = (Student *)malloc(sizeof(Student));
        node -> num = num;
        strcpy(node -> name, name);
        node -> score = score;
        node -> next = NULL;

        if (head == NULL) head = node;
        else last -> next = node;
        last = node;
    }

    return head;
}

// 将成绩低于某分数线的学生结点从链表中删除
Student *deleteStudents(Student *head, int score) {
    Student *p, *prev;
    p = head;
    prev = NULL;

    while (p != NULL) {
        if (p -> score < score) {
            if (prev == NULL) {
                head = p -> next;
            } else {
                prev -> next = p -> next;
            }
            free(p);
            p = prev == NULL ? head : prev -> next;
        } else {
            prev = p;
            p = p -> next;
        }
    }

    return head;
}

int main() {
    Student *head = NULL;
    int score;

    head = createLinkedList();

    printf("请输入成绩分数线：\n");
    scanf("%d", &score);

    head = deleteStudents(head, score);

    printf("剩余学生信息如下：\n");
    Student *p = head;
    while (p != NULL) {
        printf("%d %s %d\n", p -> num, p -> name, p -> score);
        p = p -> next;
    }

    return 0;
}

希望这段代码能够解答你的问题。如果您有其他问题，请随时问我。