random_shuffle.cpp

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#include <algorithm>   // for random_shuffle
#include <iostream>    // for cout
#include <iterator>    // for ostream_iterator
#include <string>      // for string
 
// #include <examples.h>
 
 
int main ()
{
    // Create a string of doubles (unusual? maybe, but why not...)
    typedef std::char_traits<double>                     Traits;
    typedef std::allocator<double>                       Allocator;
    typedef std::basic_string<double, Traits, Allocator> Bizarre;
 
    // Initialize a Bizarre with an array of values.
    const Bizarre::value_type a[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 
    Bizarre b (a + 0, a + sizeof a / sizeof *a);
 
    typedef std::ostream_iterator<double, char, std::char_traits<char> >
        Iter;
 
    // Suppress decimal point in output.
    std::cout.precision (0);
    std::cout.setf (std::cout.fixed, std::cout.floatfield);
 
    // Print out elements in original (sorted) order.
    std::cout << "Elements before random_shuffle: \n     ";
    std::copy (b.begin (), b.end (), Iter (std::cout," "));
 
    // Mix them up with random_shuffle.
    std::random_shuffle (b.begin (), b.end ());
 
    // Print out the mixed up elements.
    std::cout << "\n\nElements after random_shuffle: \n     ";
    std::copy (b.begin (), b.end (), Iter (std::cout, " "));
    std::cout << '\n';
 
    return 0;
}