用C语言编写一组程序，基于单链表，用头插法建表，实现某班学生姓名数据的建表、展示、查找、定位、插入、删除、判定表空，求表长等操作

好的，我可以为您提供有关C语言编写单链表的程序代码。这是一个可以展示、查找、插入、删除和操作表长等功能的程序。

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

typedef struct node {
    char name[20];
    struct node* next;
} Node;

Node* create_node(char name[20]) {
    Node* new_node = (Node*)malloc(sizeof(Node));
    if (new_node == NULL) {
        printf("Error: unable to allocate memory\n");
        exit(1);
    }
    strcpy(new_node->name, name);
    new_node->next = NULL;
    return new_node;
}

Node* insert_front(Node* head, char name[20]) {
    Node* new_node = create_node(name);
    new_node->next = head;
    return new_node;
}

int is_empty(Node* head) {
    return (head == NULL);
}

int get_length(Node* head) {
    int length = 0;
    Node* current = head;
    while (current != NULL) {
        length++;
        current = current->next;
    }
    return length;
}

Node* search(Node* head, char name[20]) {
    Node* current = head;
    while (current != NULL) {
        if (strcmp(current->name, name) == 0) {
            return current;
        }
        current = current->next;
    }
    return NULL;
}

Node* delete(Node* head, char name[20]) {
    Node* current = head;
    Node* previous = NULL;
    while (current != NULL) {
        if (strcmp(current->name, name) == 0) {
            if (previous == NULL) {
                head = current->next;
            } else {
                previous->next = current->next;
            }
            free(current);
            return head;
        }
        previous = current;
        current = current->next;
    }
    printf("Error: unable to find %s\n", name);
    return head;
}

void display(Node* head) {
    if (is_empty(head)) {
        printf("The list is empty\n");
        return;
    }
    Node* current = head;
    printf("The list: ");
    while (current != NULL) {
        printf("%s ", current->name);
        current = current->next;
    }
    printf("\n");
}

int main() {
    Node* head = NULL;

    head = insert_front(head, "Alice");
    head = insert_front(head, "Bob");
    head = insert_front(head, "Charlie");

    display(head); // Alice Bob Charlie

    Node* search_result = search(head, "Bob");
    if (search_result != NULL) {
        printf("%s is in the list\n", "Bob");
    } else {
        printf("%s is not in the list\n", "Bob");
    }

    head = delete(head, "Bob");
    display(head); // Alice Charlie

    int length = get_length(head);
    printf("The list has %d elements\n", length); // The list has 2 elements

    return 0;
}

这个程序将创建一个包含学生姓名的单链表，并使用头插法将其构建。它还提供了许多其他功能，例如展示、查找、插入、删除和操作表长等功能。为了保持代码的简洁性，我们只使用了一个结构体节点，存储学生姓名和指向下一个节点的指针。