fig20_04.cpp

来自「《c＋＋大学教程》源码」· C++ 代码 · 共 59 行

// Fig. 20.4: fig20_04.cpp
// Using the exit and atexit functions 
#include <iostream>

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

#include <cstdlib>

void print( void );

int main()
{
   atexit( print );       // register function print 

   cout << "Enter 1 to terminate program with function exit" 
        << "\nEnter 2 to terminate program normally\n";

   int answer;
   cin >> answer;

   // exit if answer is 1
   if ( answer == 1 ) {
      cout << "\nTerminating program with function exit\n";
      exit( EXIT_SUCCESS );

   }  // end if

   cout << "\nTerminating program by reaching the end of main"
        << endl;

   return 0;

}  // end main

// display message before termination
void print( void )
{
   cout << "Executing function print at program termination\n"
        << "Program terminated" << endl;

}  // end function print

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