except.cpp

来自「Think in C++文中代码实现」· C++ 代码 · 共 74 行

// File from page 690 in "Thinking in C++" by Bruce Eckel
//////////////////////////////////////////////////
// From the compressed package ECKELT02.ZIP 4/11/95
// (Original ECKELT01.ZIP dated 2/21/95)
// Copyright (c) Bruce Eckel, 1995 
// Source code file from the book "Thinking in C++", 
// Prentice Hall, 1995, ISBN: 0-13-917709-4
// All rights reserved EXCEPT as allowed by the following 
// statements: You may freely use this file for your own 
// work, including modifications and distribution in 
// executable form only. You may copy and distribute this 
// file, as long as it is only distributed in the complete 
// (compressed) package with the other files from this 
// book and you do not remove this copyright and notice. 
// You may not distribute modified versions of the source 
// code in this package. This package may be freely placed 
// on bulletin boards, internet nodes, shareware disks and 
// product vendor disks. You may not use this file in 
// printed media without the express permission of the 
// author. Bruce Eckel makes no 
// representation about the suitability of this software 
// for any purpose. It is provided "as is" without express 
// or implied warranty of any kind. The entire risk as to 
// the quality and performance of the software is with 
// you. Should the software prove defective, you assume 
// the cost of all necessary servicing, repair, or 
// correction. 
// If you think you've found an error, please 
// email all modified files with loudly commented changes 
// to: [e-mail] (please use the same 
// address for non-code errors found in the book).
//////////////////////////////////////////////////

//: EXCEPT.CPP -- Basic exceptions
// Exception specifications & unexpected()
#include <except.h>
#include <iostream.h>
#include <stdlib.h>
#include <string.h>

class up {};
class fit {};
void g();

void f(int i) throw (up, fit) {
  switch(i) {
    case 1: throw up();
    case 2: throw fit();
  }
  g();
}

// void g() {} // version 1
void g() { throw 47; } // Version 2
// (can throw built-in types)

void my_unexpected() {
  cout << "unexpected exception thrown";
  exit(1);
}

main() {
  set_unexpected(my_unexpected);
  // (ignores return value)
  for(int i = 1; i <=3; i++)
    try {
      f(i);
    } catch(up) {
      cout << "up caught" << endl;
    } catch(fit) {
      cout << "fit caught" << endl;
    }
}