c++代码错误，求教（结构体，动态分配）

 #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

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...

#if 0
#include
#include
//#include
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 *p = NULL;
char* cmd_1;
char* cmd_2;
char* cmd_3;
do
{
    cout << ">>";
    getline(cin, cmd);
    cmd_1 = strtok_s((char*)cmd.data(), " ", &p);
    cmd_2 = strtok_s(NULL, " ", &p);
    cmd_3 = strtok_s(NULL, " ", &p);
    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];
}

    //此处崩溃!!! 原因：cmd1为NULL,而atol内部实现是参数为空的话会抛出异常，那么此处崩溃是正常的。详见网页
    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;
    }
}

}
#endif
详见MSDN

没看完，当然你的title用的时候是必须分配空间的。不能直接赋值...