#include <algorithm>
 #include <array>
 #include <iostream>

 int main(){

   std::cout << std::endl;

   std::array <int,8> array1{1,2,3,4,5,6,7,8};
   std::for_each(array1.begin(),array1.end(),[](int v){std::cout << v << " ";});

   std::cout << std::endl;

   int sum = 0;
   std::for_each(array1.begin(), array1.end(),[&sum](int v) { sum += v; });
   std::cout << "sum of array{1,2,3,4,5,6,7,8}: " << sum << std::endl;

   std::for_each(array1.begin(), array1.end(),[](int& v) { v=v*v; });
   std::for_each( array1.begin(),array1.end(),[](int v){std::cout << v << " ";});

   std::cout << "\n\n";
 }