remove.cpp

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#include <rw/_config.h>
 
#if defined (__IBMCPP__) && !defined (_RWSTD_NO_IMPLICIT_INCLUSION)
// Disable implicit inclusion to work around 
// a limitation in IBM's VisualAge 5.0.2.0 (see PR#26959) 
 
#  define _RWSTD_NO_IMPLICIT_INCLUSION 
#endif
 
#include <algorithm>    // for copy, remove, remove_copy, remove_if
#include <functional>   // for unary_function
#include <iostream>     // for cout, endl
#include <iterator>     // for ostream_iterator
#include <vector>       // for vector
 
 
//  template<class Arg>
//  struct not_zero: public std::unary_function<Arg, bool>
//  {
//      bool operator() (const Arg &a) const {
//          return a != 0;
//      }
//  };
 
 
typedef std::greater<int>              int_greater;
typedef std::binder2nd<int_greater>    bnd_greater;
 
int main ()
{
    // For convenience.
    typedef std::vector<int, std::allocator<int> >                    Vector;
    typedef std::ostream_iterator<int, char, std::char_traits<char> > Iter;
 
    // Populate a vector with elements from an array.
    const Vector::value_type arr[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    Vector v (arr + 0, arr + sizeof arr / sizeof *arr);
 
    // Write out the contents to cout.
    std::copy (v.begin (), v.end (), Iter (std::cout," "));
    std::cout << std::endl << std::endl;
 
    // Move the 7 to the end of the vector.
    Vector::iterator result = std::remove (v.begin (), v.end (), 7);
 
    // Delete the 7 from the vector.
    v.erase (result, v.end ());
 
    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
    std::cout << std::endl << std::endl;
 
    // Remove all non-zero elements beyond the fourth element.
    v.erase (std::remove_if (v.begin () + 4, v.end (), 
                             bnd_greater( int_greater (), 0 )), v.end ());
 
    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
    std::cout << std::endl << std::endl;
 
    // Now remove all 3s on output.
    std::remove_copy (v.begin (), v.end (), Iter (std::cout, " "), 3);
    std::cout << std::endl << std::endl;
 
    // Now remove everything satisfying predicate on output.
    std::remove_copy_if (v.begin (), v.end (), Iter (std::cout, " "),
                         bnd_greater( int_greater (), 0 ) );
 
    // Return 0 on success, a non-zero value on failure
    return !!v.empty ();
}