prog17_05.cpp

来自「一本语言类编程书籍」· C++ 代码 · 共 40 行

// Program 17.5 Catching exceptions with a base class handler  File: prog17_05.cpp
#include <typeinfo>
#include <iostream>
#include "MyTroubles.h"
using std::cout;
using std::endl;

int main() {
  Trouble trouble;
  MoreTrouble moreTrouble;
  BigTrouble bigTrouble;

  cout << endl;
  for(int i = 0 ; i < 7 ; i++) {
    try {
      if(i < 3)
        throw trouble;
      if(i < 5)
        throw moreTrouble;
      else
        throw bigTrouble;
    }
//    catch(BigTrouble& rT) {
//      cout << "  BigTrouble object caught: " << rT.what() << endl;
//    }
//    catch(MoreTrouble& rT) {
//      cout << " MoreTrouble object caught: " << rT.what() << endl;
//    }
    catch(Trouble& rT) {            // Base class handler only
 //     cout << "Trouble object caught: " << rT.what() << endl;
      cout << typeid(rT).name() << " object caught: " << rT.what() << endl;
    }

    cout << "End of the for loop (after the catch blocks) - i is " << i << endl;
  }

  cout << endl;
  return 0;
}