equal.cpp

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#include <algorithm>    // for equal
#include <functional>   // for equal_to
#include <ios>          // for boolalpha
#include <iostream>     // for cout, endl
#include <iterator>     // for ostream_iterator
#include <vector>       // for vector
 
#include <examples.h>
 
 
int main ()
{
    // Typedef for convenience.
    typedef std::vector<int, std::allocator<int> > Vector;
 
    typedef std::ostream_iterator <Vector::value_type,
                                   char,
                                   std::char_traits<char> > os_iter;
 
    const Vector::value_type a1[] = { 1, 2, 3, 4 };
    const Vector::value_type a2[] = { 1, 2, 4, 3 };
 
    // Set up two vectors.
    const Vector v1 (a1, a1 + sizeof a1 / sizeof *a1);
    const Vector v2 (a2, a2 + sizeof a2 / sizeof *a2);
 
    // Check for equality.
    bool same = std::equal (v1.begin (), v1.end (), v2.begin ());
 
    same = same && std::equal (v1.begin (), v1.end (), v2.begin (), 
                               std::equal_to<Vector::value_type>());
 
    // Output the sequences.
    std::cout << "{ ";
    std::copy (v1.begin (), v1.end (), os_iter (std::cout, " "));
 
    std::cout << "} == { ";
    std::copy (v2.begin (), v2.end (), os_iter (std::cout, " "));
 
    // Output the result.
    std::cout << "} --> " << std::boolalpha << same << std::endl;
 
    return 0;
}