c语言怎么从文件中读取数据到链表

以下是使用C语言从文件中读取数据到链表的示例代码：

#include <stdio.h>
#include <stdlib.h>
// 定义链表节点结构体
struct Node {
    int data;
    struct Node* next;
};

// 读取文件数据到链表
struct Node* readFileToList(const char* filename) {
    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("Failed to open file.\n");
        return NULL;
    }

    struct Node* head = NULL;
    struct Node* tail = NULL;
    int value;

    // 逐行读取文件数据
    while (fscanf(file, "%d", &value) != EOF) {
        // 创建新节点
        struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
        newNode->data = value;
        newNode->next = NULL;

        // 将节点插入链表尾部
        if (head == NULL) {
            head = newNode;
            tail = newNode;
        } else {
            tail->next = newNode;
            tail = newNode;
        }
    }

    fclose(file);
    return head;
}

// 打印链表数据
void printList(struct Node* head) {
    struct Node* current = head;
    while (current != NULL) {
        printf("%d ", current->data);
        current = current->next;
    }
    printf("\n");
}

int main() {
    const char* filename = "data.txt";
    struct Node* head = readFileToList(filename);
    if (head != NULL) {
        printf("Data in the list: ");
        printList(head);
    }

    return 0;
}