basexcpt.cpp

Thingking in c++第二版

//: C07:Basexcpt.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Exception hierarchies
#include <iostream>
using namespace std;

class X {
public:
  class Trouble {};
  class Small : public Trouble {};
  class Big : public Trouble {};
  void f() { throw Big(); }
};

int main() {
  X x;
  try {
    x.f();
  } catch(X::Trouble) {
    cout << "caught Trouble" << endl;
  // Hidden by previous handler:
  } catch(X::Small) {
    cout << "caught Small Trouble" << endl;
  } catch(X::Big) {
    cout << "caught Big Trouble" << endl;
  }
} ///:~