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#include <iostream>     // std::cout
#include <iterator>     // std::ostream_iterator
#include <vector>       // std::vector
#include <algorithm>    // std::copy
#include <iterator>
 
int main () {
  int Grades[5] = { 3, 2, 5, 2 };
 
  std::copy (std::begin(Grades), std::end(Grades), std::ostream_iterator<int>(std::cout, ", ") );
  return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:10:14: error: 'begin' is not a member of 'std'
   std::copy (std::begin(Grades), std::end(Grades), std::ostream_iterator<int>(std::cout, ", ") );
              ^
prog.cpp:10:34: error: 'end' is not a member of 'std'
   std::copy (std::begin(Grades), std::end(Grades), std::ostream_iterator<int>(std::cout, ", ") );
                                  ^

Standard output is empty