fig20_14.cpp

经典vc教程的例子程序

// Fig. 20.14: fig20_14.cpp
// Testing Standard Library vector class template
#include <iostream>
#include <vector>

using namespace std;

template < class T >
void printVector( const vector< T > &vec );

int main()
{
   const int SIZE = 6;   
   int a[ SIZE ] = { 1, 2, 3, 4, 5, 6 };
   vector< int > v;

   cout << "The initial size of v is: " << v.size()
        << "\nThe initial capacity of v is: " << v.capacity();
   v.push_back( 2 );  // method push_back() is in
   v.push_back( 3 );  // every sequence collection
   v.push_back( 4 );
   cout << "\nThe size of v is: " << v.size()
        << "\nThe capacity of v is: " << v.capacity();
   cout << "\n\nContents of array a using pointer notation: ";

   for ( int *ptr = a; ptr != a + SIZE; ++ptr )
      cout << *ptr << ' ';

   cout << "\nContents of vector v using iterator notation: ";
   printVector( v );

   cout << "\nReversed contents of vector v: ";

   vector< int >::reverse_iterator p2;

   for ( p2 = v.rbegin(); p2 != v.rend(); ++p2 )
      cout << *p2 << ' ';

   cout << endl;
   return 0;
}

template < class T >
void printVector( const vector< T > &vec )
{
   vector< T >::const_iterator p1;

   for ( p1 = vec.begin(); p1 != vec.end(); p1++ )
      cout << *p1 << ' ';
}


/*
   Demonstrates      
      Vector declaration
      passing vector to method via const reference
      push_back
      size
      capacity
      begin
      end
      rbegin
      rend
*/