如何在C中while context中多次读取链表

typedef struct Node {
    int data;           // 数据
    struct Node* next;  // 指向下一个节点的指针
} Node;

Node* createNode(int data) {
    Node* newNode = (Node*)malloc(sizeof(Node));
    newNode->data = data;
    newNode->next = NULL;
    return newNode;
}

void addNode(Node** head, int data) {
    Node* newNode = createNode(data);
    if (*head == NULL) {
        *head = newNode;
    } else {
        Node* temp = *head;
        while (temp->next != NULL) {
            temp = temp->next;
        }
        temp->next = newNode;
    }
}

Node* current = head;  // head为链表的头节点指针
while (current != NULL) {
    int data = current->data;
    // 在这里进行对数据的处理或其他操作
    current = current->next;
}