c++代码错误，求教（结构体，动态分配）

Question

 #include<string>
#include<iostream>
//#include<stdlib.h>
using namespace std;
struct book
{
    int ID;
    char* title ;
    int status;
};

void getCmdNum(const char *cmd,char *cmd1, char *cmd2);

int bookCounter = 0;
book *Book;
book *tempBook;

int main()
{
    string cmd;


    char* cmd_1;
    char* cmd_2;
    char* cmd_3;
    do
    {
        cout << ">>";
        getline(cin, cmd);
        cmd_1 = strtok((char*)cmd.data(), " ");
        cmd_2 = strtok(NULL, " ");
        cmd_3 = strtok(NULL, " ");
        getCmdNum((const char*)cmd_1, cmd_2, cmd_3);
    } while (1);
}

void getCmdNum(const char* cmd,char* cmd1,char* cmd2)
{
    if (!strcmp(cmd,"addbook"))
    {
        tempBook = new book[bookCounter];
        for (int i = 0; i < bookCounter; i++)
        {
            tempBook[i] = Book[i];
        }
        Book = new book[bookCounter+1];
        for (int i = 0; i < bookCounter;i++)
        {
            Book[i] = tempBook[i];
        }

        long ID = atol(cmd1);
        Book[bookCounter].ID = ID;
        Book[bookCounter].title = cmd2;
        bookCounter++;
    }
    if (!strcmp(cmd, "listbook"))
    {
        for (int i = 0; i < bookCounter; i++)
        {
            cout << (i + 1) << ".  " << Book[i].ID << "     " << Book[i].title;
            if (Book[i].status != 1)
                cout << "     on shelf" << endl;
            else
                cout << "     borrowed" << endl;
        }
    }
}

在运行的时候先addbook 在listbook然后book[].title会重叠出错，不知道是为什么。
输入格式为

addbook book[].ID book[].title

Answer 1

cout << (i + 1) << ". " << Book[i].ID << " " << Book[i].title;

还有你的这一行，若果进来，因为你的Book[i].title此时指向的是NULL，所以输出肯定蹦...