// fig14_08.cpp
// Algorithms swap, iter_swap and swap_ranges.
#include <algorithm> 
#include <array>
#include <iostream>
#include <iterator> 

int main() {
   std::array values{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
   std::ostream_iterator<int> output{std::cout, " "};

   std::cout << "values contains: ";
   std::ranges::copy(values, output);

   std::swap(values[0], values[1]); // swap elements at index 0 and 1

   std::cout << "\nafter std::swap of values[0] and values[1]: ";
   std::ranges::copy(values, output);

   // use iterators to swap elements at locations 0 and 1 
   std::iter_swap(values.begin(), values.begin() + 1);
   std::cout << "\nafter std::iter_swap of values[0] and values[1]: ";
   std::ranges::copy(values, output);

   // swap values and values2  
   std::array values2{10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
   std::cout << "\n\nBefore swap_ranges\nvalues contains: ";
   std::ranges::copy(values, output);
   std::cout << "\nvalues2 contains: ";
   std::ranges::copy(values2, output);
   std::ranges::swap_ranges(values, values2);
   std::cout << "\n\nAfter swap_ranges\nvalues contains: ";
   std::ranges::copy(values, output);
   std::cout << "\nvalues2 contains: ";
   std::ranges::copy(values2, output);

   // swap first five elements of values and values2
   std::ranges::swap_ranges(values.begin(), values.begin() + 5,
      values2.begin(), values2.begin() + 5);

   std::cout << "\n\nAfter swap_ranges for 5 elements"
      << "\nvalues contains: ";
   std::ranges::copy(values, output);
   std::cout << "\nvalues2 contains: ";
   std::ranges::copy(values2, output);
   std::cout << "\n";
}



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