#include <iostream>
#include <algorithm>

int main()
{
    int dummy[] = { 1, 2, 3, 4, 5 };

    // Swap elements:
    std::swap( dummy[ 0 ], dummy[ 4 ] );

    // Display elements of dummy array:
    std::cout
        << dummy[ 0 ]
        << '\t'
        << dummy[ 4 ]
        ;

    return 0;
}