Copy elements from one vector to another vector, removing elements greater than 9 in the process : remove_copy_if « STL Algorithms Modifying sequence operations « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Modifying sequence operations
3. remove_copy_if

#include <iostream>
using std::cout;
using std::endl;

#include <algorithm>
#include <vector>
#include <iterator>

bool greater9( int );

int main()
{
   int a[ 10 ] = { 10, 2, 10, 4, 16, 6, 14, 8, 12, 10 };

   std::ostream_iterator< int > output( cout, " " );

   std::vector< int > v4( a, a + 10 ); // copy of a
   std::vector< int > c2( 10, 0 ); // instantiate vector c2
   cout << "Vector v4 before removing all elements"
      << "\ngreater than 9 and copying:\n   ";
   std::copy( v4.begin(), v4.end(), output );

   std::remove_copy_if( v4.begin(), v4.end(), c2.begin(), greater9 );
   cout << "\nVector c2 after removing all elements"
      << "\ngreater than 9 from v4:\n   ";
   std::copy( c2.begin(), c2.end(), output );
   cout << endl;

   return 0;
}

bool greater9( int x )
{
   return x > 9;
}

Vector v4 before removing all elements
greater than 9 and copying:
   10 2 10 4 16 6 14 8 12 10
Vector c2 after removing all elements
greater than 9 from v4:
   2 4 6 8 0 0 0 0 0 0