includes.cpp

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#include <algorithm>   // for includes
#include <iostream>    // for cout, endl
#include <iterator>    // for ostream_iterator
#include <set>         // for set
 
#include <examples.h>
 
 
int main ()
{
    // Typedefs for convenience.
    typedef std::set<int, std::less<int>, std::allocator<int> >       Set;
    typedef std::ostream_iterator<int, char, std::char_traits<char> > os_iter;
 
    int a1[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    int a2[] = { 2, 4, 6, 8, 10, 12 };
    int a3[] = { 3, 5, 7, 8 };
 
    // Initialize three sets.
    Set all   (a1, a1 + sizeof a1 / sizeof *a1);
    Set even  (a2, a2 + sizeof a2 / sizeof *a2);
    Set other (a3, a3 + sizeof a3 / sizeof *a3);
 
    // Demonstrate includes.
    std::cout << "The set: ";
    std::copy (all.begin (), all.end (), os_iter (std::cout, " "));
 
    bool answer = std::includes (all.begin (), all.end (), 
                                 other.begin (), other.end ());
 
    std::cout << std::endl << (answer ? "INCLUDES " : "DOES NOT INCLUDE ");
    std::copy (other.begin (), other.end (), os_iter (std::cout, " "));
 
    answer = std::includes (all.begin (), all.end (),
                            even.begin (), even.end ());
 
    std::cout << ", and" << std::endl
              << (answer ? "INCLUDES" : "DOES NOT INCLUDE ");
 
    std::copy (even.begin (), even.end (), os_iter (std::cout, " "));
 
    std::cout << std::endl << std::endl;
 
    return 0;
}