fig16_07.cpp

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Fig. 16.7: Fig16_07.cpp
// Demonstrating set_new_handler.
#include <iostream>
using std::cerr;
using std::cout;

#include <new> // standard operator new and set_new_handler
using std::set_new_handler;

#include <cstdlib> // abort function prototype
using std::abort;

// handle memory allocation failure
void customNewHandler()                  
{                                        
   cerr << "customNewHandler was called";
   abort();                              
} // end function customNewHandler       

// using set_new_handler to handle failed memory allocation
int main()
{
   double *ptr[ 50 ];

   // specify that customNewHandler should be called on 
   // memory allocation failure                         
   set_new_handler( customNewHandler );                 

   // allocate memory for ptr[ i ]; customNewHandler will be
   // called on failed memory allocation
   for ( int i = 0; i < 50; i++ )
   {
      ptr[ i ] = new double[ 50000000 ]; // may throw exception
      cout << "Allocated 50000000 doubles in ptr[ " << i << " ]\n";
   } // end for

   return 0;
}  // end main

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