partial_sort.cpp

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#include <algorithm>   // for partial_sort
#include <iostream>    // for cout, endl
#include <iterator>    // for ostream_iterator
#include <vector>      // for vector
 
#include <examples.h>
 
 
int main()
{
    typedef std::vector<int, std::allocator<int> >                    Vector;
    typedef std::ostream_iterator<int, char, std::char_traits<char> > Iter;
 
    const Vector::value_type a[] = {
        17, 3,  5,  -4, 1, 12, -10, -1, 14, 7,
        -6, 8, 15, -11, 2, -2,  18,  4, -3, 0
    };
 
    Vector v1 (a + 0, a + sizeof a / sizeof *a);
 
    // Output original vector.
    std::cout << "For the vector: ";
    std::copy (v1.begin (), v1.end (), Iter (std::cout, " "));
 
    // Partial sort the first seven elements.
    std::partial_sort (v1.begin (), v1.begin () + 7, v1.end ());
 
    // Output result.
    std::cout << "\n\nA partial_sort of seven elements gives: \n     ";
    std::copy (v1.begin (), v1.end (), Iter (std::cout, " "));
    std::cout << std::endl;
 
    // A vector of ten elements.
    Vector v2 (Vector::size_type (10), 0);
 
    // Sort the last ten elements in v1 into v2.
    std::partial_sort_copy (v1.begin () + 10, v1.end (),
                            v2.begin (), v2.end ());
 
    // Output result.
    std::cout
        << "\nA partial_sort_copy of the last ten elements gives: \n     ";
    std::copy (v2.begin (), v2.end (), Iter (std::cout, " "));
 
    std::cout << std::endl;
 
    return 0;
}