向指定list的尾部插入一个节点（无首节点）

insert-node.c

Node* insert(Node *head,int data)
{
    Node *tail;
    Node *tmp;
    tail = (Node *)malloc(sizeof(struct Node));
    tail->data = data;
    if(head == NULL){
        head = tail;
    }else{
        tmp = head;
        while(tmp->next != NULL)
            tmp = tmp->next;
        tmp->next = tail;
    }
    return head;
}