//Eg10-12.cpp
#include<iostream>
using namespace std;
class BasicException{
    public:
        char* Where(){return "BasicException...";}
};
class FileSysException:public BasicException{
    public:
        char *Where(){return "FileSysException...";}
};
class FileNotFound:public FileSysException{
    public:
        char *Where(){return "FileNotFound...";}
};
class DiskNotFound:public FileSysException{
    public:
        char *Where(){return "DiskNotFound...";}
};
int main(){
    try{
//         .....  //程序代码
         throw FileSysException();
    }
    catch(DiskNotFound p){cout<<p.Where()<<endl;}
    catch(FileNotFound p){cout<<p.Where()<<endl;}
    catch(FileSysException p){cout<<p.Where()<<endl;}
    catch(BasicException p){cout<<p.Where()<<endl;}
    try{
//        .....  //程序代码
         throw DiskNotFound();
    }
    catch(BasicException p){cout<<p.Where()<<endl;}
    catch(FileSysException p){cout<<p.Where()<<endl;}
    catch(DiskNotFound p){cout<<p.Where()<<endl;}
    catch(FileNotFound p){cout<<p.Where()<<endl;}
}