//文件名:CHAPTER7-8.cpp
#include <deque>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
#include <iostream>
int main( ) 
{   deque <int> c1;
   deque <int>::iterator c1_Iter;
   deque <int>::reverse_iterator c1_rIter;
   c1.push_back( 10 );
   c1.push_back( 20 );
   c1.push_back( 30 );
   c1_rIter = c1.rbegin( ); //指向c1的最后一個元素
   cout << "Last element in the deque is " << *c1_rIter << "." << endl;
   cout << "The deque contains the elements: ";
   for ( c1_Iter = c1.begin( ); c1_Iter != c1.end( ); c1_Iter++ )
      cout << *c1_Iter << " "; //順序顯示deque的元素
   cout << "in that order.";
   cout << endl;
   cout << "The reversed deque is: ";
   for ( c1_rIter = c1.rbegin( ); c1_rIter != c1.rend( ); c1_rIter++ )
      cout << *c1_rIter << " ";//反序顯示deque的元素
   cout << endl;
   c1_rIter = c1.rbegin( );
   *c1_rIter = 40;  // This would have caused an error if a const_reverse iterator had been declared 
//as noted above
   cout << "Last element in deque is now " << *c1_rIter << "." << endl;
   return 0;
}