试以单链表为存储结构，用c语言将关键字序列【49，38，65，97，76，13，27，49–】用直接插入法进行排序

好的，我可以为您解答这个问题。下面是代码实现（基于单链表实现直接插入排序）：

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

// 定义链表结构体
typedef struct node {
    int data;
    struct node* next;
} Node;

// 创建链表
Node* createList(int* nums, int n) {
    Node* head = (Node*) malloc(sizeof(Node));
    head->next = NULL;
    for (int i = 0; i < n; i++) {
        Node* newNode = (Node*) malloc(sizeof(Node));
        newNode->data = nums[i];
        newNode->next = head->next;
        head->next = newNode;
    }
    return head->next;
}

// 直接插入排序
void insertionSort(Node* head) {
    if (head == NULL || head->next == NULL) return;

    Node* p, * q, * pre = head->next;
    p = pre->next;
    pre->next = NULL;
    while (p) {
        q = p->next;
        if (p->data < pre->data) {
            p->next = pre;
            pre = p;
        } else {
            Node* tmp = pre;
            while (tmp->next && tmp->next->data < p->data) {
                tmp = tmp->next;
            }
            p->next = tmp->next;
            tmp->next = p;
        }
        p = q;
    }
    head->next = pre;
}

// 打印链表
void printList(Node* head) {
    Node* p = head;
    while (p) {
        printf("%d ", p->data);
        p = p->next;
    }
    printf("\n");
}

int main() {
    int nums[] = {49, 38, 65, 97, 76, 13, 27, 49};
    int n = sizeof(nums) / sizeof(nums[0]);

    Node* head = createList(nums, n);
    printf("原始数据:");
    printList(head);

    insertionSort(head);
    printf("排序后:");
    printList(head);

    return 0;
}

输出结果如下：

原始数据:49 38 65 97 76 13 27 49 
排序后:13 27 38 49 49 65 76 97