//LinkList.cpp
#include <iostream>
#include<iomanip>
#include"LinkList.h"
using namespace std;


bool isEmpty(bookList *l) {
    if ((*l)->next == NULL) {
        return true;
    }
    return false;
}

void create(bookList &l) {
    bookNode *input = new bookNode;
    input->next = NULL;
    bookNode *temp = l; // 从头节点开始
    bool flag = true;

    while (flag) {
        cin >> input->id >> input->name >> input->price;

        if (input->id == "0" && input->name == "0" && input->price == 0) {
            flag = false;
            delete input;
        } else {
            if (temp == l) {
                l->next = input;
            } else {
                temp->next = input;
            }
            temp = input;
            input = new bookNode;
            input->next = NULL;
        }
    }
}

void display(bookList *l) {
    if (isEmpty(l)) {
        printf("List is empty\n");
    } else {
        bookNode *temp = (*l)->next;
        while (temp != NULL) {
            cout << temp->id << " " << temp->name << " " << fixed << setprecision(2) << temp->price << endl;
            temp = temp->next;
        }
    }
}

int getLength(bookList *l) {
    if (isEmpty(l)) {
        return 0;
    }
    bookNode *temp = (*l)->next;
    int length = 0;
    while (temp != NULL) {
        length++;
        temp = temp->next;
    }
    return length;
}