关于#books#的问题，如何解决？

Question

#include "ds.h"//自定义的头文件
using namespace std;//c++中指定命名空间

struct books //定义一种图书信息结构体类型
{
    int num; //书的数量
    int ISBN; //书号
    char BookName[MAXSIZE]; //书名
    char author[MAXSIZE]; //作者
    char publisher[MAXSIZE]; //出版单位
    float price;//价格
};
books book[1000];

void output(books  book[], int num)
{
    int i;
    for (i = 0; i < num; i++)
    {
        cout << book[i].ISBN << "  " << book[i].BookName << "  " << book[i].author << "  " << book[i].publisher << "  " << book[i].price << endl;
    }
    cout<<"\n";
}

void insertm(books book[], int &num)   //在最后面依次添加num本图书
{
    int i = 0, m = 0;
    cout << "需要添加图书信息的本数为：\n ";
    cin >> m;
    cout << "请输入其信息【依次为书号（ISBN) 书名 作者 出版单位 价格（书号不重复，用空格空开】\n ";
    for (i = 0; i < m; i++)
    {
        cin >> book[i + num].ISBN >> book[i + num].BookName >> book[i + num].author >> book[i + num].publisher >> book[i + num].price;
    }
    num = num + m;
    cout << "图书信息添加后为：\n";
}

int delete_books(books book)
{
    int i,j,choice,BookNumber1,t=0;
    char BookName1;
    cout<<"进入删除图书系统\n";
    cout<<"按书号删除请按1\n";
    cout<<"按书名删除请按2\n";
    cin>>choice;
    switch(choice)
    {
    case 1:
        cout<<"请输入你想删除的图书的书号： ";
        cin>>BookNumber1;
        /*if(lib->size == 0)
            cout<<"图书库中无信息，删除失败！"<<endl;*/
        for(i=0; i<book.num; i++)
        {
            if(BookNumber1 ==book[i].ISBN)
            {
                t = i; //记住要删除图书的下标
            }
            else
                cout<<"删除失败，请确认书号是否正确！"<<endl;
        }
        if(t != book.num-1) //判断要删除图书是否为最后一本 即判断t是否为最后一个值
        {
            for(i=t; i<book.num; i++)
            {
                book[i] = book[i+1];
            }
        }
        book.num = book.num-1;
    case 2:
        cout<<"请输入你想删除的图书的书名： ";
        cin>>BookName1;
        for(i=0; i<book.num; i++)
        {
            if(BookName1 == book.BookName[i])
            {
                t = i; //记住要删除图书的下标
            }
            else
                cout<<"删除失败，请确认书名是否正确！"<<endl;
        }
        if(t != book.num-1) //判断要删除图书是否为最后一本 即判断t是否为最后一个值
        {
            for(i=t; i<book.num; i++)
            {
                book[i] = book[i+1];
            }
        }
        book.num = book.num-1;
}

void change_books(books book);
{
    int BookNumber3,i,t=0,choice;
    cout<<"请输入要修改信息图书的书号："<<endl;
    cin>>BookNumber3;
    for(i=0; i<book.num; i++)
    {
        if(BookNumber3 == book[i].ISBN)
        {
            t == i;
        }
        else
            cout<<"无图书信息，请确认书号是否正确！"<<endl;
    }
    cout<<"请输入需要修改信息的序号:"<<endl;
    cout<<"1.书名"<<endl;
    cout<<"2.作者"<<endl;
    cout<<"3.出版单位"<<endl;
    cout<<"4.价格"<<endl;
    cin>>choice;
    switch(choice)
    {
        case 1:
            cout<<"请输入：";
            cin>>book.BookName[t];
        case 2:
            cout<<"请输入：";
            cin>>book.author[t];
        case 3:
            cout<<"请输入：";
            cin>>book.publisher[t];
            //break;
        case 4:
            cout<<"请输入：";
            cin>>book.price[t];
            //break;
        default:
            cout<<"输入错误！"<<endl;
    }
}

void book_search(books book);
{
    int i,j,choice,ISBN2;
    char BookName2;
    cout<<"进入查询图书系统\n";
    cout<<"按书号查询请按1\n";
    cout<<"按书名查询请按2\n";
    cin>>choice;
    switch(choice)
    {
    case 1:
        cout<<"请输入你想查询的图书的书号：";
        cin>>ISBN2;
        for(i=0; i<book.num-1; i++)
        {
            if(ISBN2 == book[i].ISBN)
            {
                cout<<"查询成功\n";
                cout<<"该书基本信息为：\n";
                cout<<"书名："<<book.BookName[i]<<" 作者；"<<book.author[i]<<" 出版单位："<<book.publisher[i]<<" 价格："<<book.price[i];
            }
        }
        cout<<"查询失败，请核对书号是否正确\n";
    case 2:
        cout<<"请输入你想查询的图书的书名：";
        cin>>BookName2;
        for(i=0; i<book.num-1; i++)
        {
            if(BookName2 == book[i].BookName)
            {
                cout<<"查询成功\n";
                cout<<"该书基本信息为：\n";
                cout<<"书名："<<book.BookName[i]<<" 作者；"<<book.author[i]<<" 出版单位："<<book.publisher[i]<<" 价格："<<book.price[i];
            }
        }
        cout<<"查询失败，请核对书名是否正确\n";
    }
}

void main();
{
    system("time/t");   //显示系统当前时间
    struct books book[1000];
    books book1;
    int i,num;
    cout << "请输入你想进行图书信息管理的图书本数：\n";
    cin >> book[i].num;
    cout << "请输入" << book[i].num << "本图书信息 【书号（ISBN) 书名 作者 出版单位 价格（书号不重复），用空格空开】: \n";   //完成图书信息输入
    for (i = 0; i < book[i].num; i++)
    {
        cin >> book[i].ISBN >> book[i].BookName >> book[i].author >> book[i].publisher >> book[i].price;   //字符数组进行整体输入
    }
    cout << "进行图书信息浏览：    " << endl;
    output(book, num);
    insertm(book, num);
    output(book, num);
    delete_books(book1);
    change_books(book1);
    book_search(book1);
    system("pause");
}

为啥子case和break报错呐

Answer 1

仔细调试下，不知道你switch里好好的，break都注释了干嘛