fig18_06.cpp

这是C＋＋编程经典的书上实例的源代码。 （英文名是《C＋＋ how to program》第3版）

// Fig. 18.6: fig18_06.cpp
// Using signal handling 
#include <iostream>

using std::cout;
using std::cin;
using std::endl;

#include <iomanip>

using std::setw;

#include <csignal>
#include <cstdlib>
#include <ctime>

void signal_handler( int );

int main()
{
   signal( SIGINT, signal_handler );
   srand( time( 0 ) );
   
   for ( int i = 1; i < 101; i++ ) {
      int x = 1 + rand() % 50;
      
      if ( x == 25 )
         raise( SIGINT );
         
      cout << setw( 4 ) << i;

      if ( i % 10 == 0 )
         cout << endl;
   }

   return 0;
}

void signal_handler( int signalValue )
{
   cout << "\nInterrupt signal (" << signalValue
        << ") received.\n"
        << "Do you wish to continue (1 = yes or 2 = no)? ";

   int response;
   cin >> response;

   while ( response != 1 && response != 2 ) {
      cout << "(1 = yes or 2 = no)? ";
      cin >> response;
   }
   
   if ( response == 1 )
      signal( SIGINT, signal_handler );
   else
      exit( EXIT_SUCCESS );
}

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 * (C) Copyright 2000 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
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