创建单链表

// ds01.cpp: 分别采用前插法和后插法创建链表
// 最新修改：2010-10-21
// 作者：zxh

#include "stdafx.h"
using namespace std;

//链表节点
struct Book
{
    string name;
    Book *next;
};

//前插法创建链表
Book *CreateLink()
{
    size_t bookNum = 0;
    string name = "";
    Book *head = new Book();
    head->next = NULL;
    cout << "please input the number of the books : ";
    if(cin >> bookNum,bookNum!=0)
    {
        for(size_t i=0; i< bookNum ; i++)
        {
            cout << endl << "please input the " << (i+1) << "th book's name: ";
            cin >> name;
            
            Book *p = new Book();
            p->name = name;

            //前插法
            p->next = head->next;
            head->next = p;
        }
    }
    else
    {
        cout << endl << "invalid input!" << endl;
        exit(EXIT_FAILURE);
    }
    return head;
}

//尾插法创建链表
Book *CreateLinkEnd()
{
    size_t bookNum = 0;
    string name = "";
    Book *head = new Book();
    Book *parent = head;
    head->next = NULL;
    cout << "please input the number of the books : ";
    if(cin >> bookNum,bookNum!=0)
    {
        for(size_t i=0; i< bookNum ; i++)
        {
            cout << endl << "please input the " << (i+1) << "th book's name: ";
            cin >> name;
            
            Book *p = new Book();
            p->name = name;

            //尾插法
            p->next = NULL;
            parent->next = p;
            parent = p;
        }
    }
    else
    {
        cout << endl << "invalid input!" << endl;
        exit(EXIT_FAILURE);
    }
    return head;
}

void ShowBookNames(Book* head)
{
    cout << "you have the following books:";
    while(head!=NULL)
    {
        cout << head->name << endl;
        head=head->next;
    }
}


int _tmain(int argc, _TCHAR* argv[])
{
    Book *head = CreateLink();
    ShowBookNames(head);

    Book *tail = CreateLinkEnd();
    ShowBookNames(tail);

    char *str = "Linux was first developed for 386/486-based PCs";
    char *accept = "aabcLiddnaacxujjd";
    cout << "Has:" << strcspn(str,accept);

    time_t timp;
    time(&timp);
    cout << endl << asctime(gmtime(&timp)) << endl;
    cout << ctime(&timp) << endl;

    char *a = (char *)calloc(20,sizeof(char));
    char b[] = "string(b)";

    _memccpy(a,b,'b',sizeof(b));

    cout << "memccpy():" << a;
    
   

    system("pause");
    return 0;
}