Поиск по массиву

#include <iostream>
#include <algorithm>
#include <vector>
 
int main()
{
   int Arr1[]={1,2,3,4,5};
   int Arr2[]={1,2,3,4,6};
   std::vector<int> Vec1(Arr1, Arr1+sizeof(Arr1)/sizeof(Arr1[0]));
   std::vector<int> Vec2(Arr2, Arr2+sizeof(Arr2)/sizeof(Arr2[0]));
   std::vector<int> Vec3;
   for(int i=0; i!=Vec2.size(); ++i)
   {
       if(find(Vec1.begin(), Vec1.end(), Vec2[i])!=Vec1.end())
           Vec3.push_back(Vec2[i]);
   }
   std::vector<int>::const_iterator It=Vec3.begin();
   for(It=Vec3.begin(); It!=Vec3.end(); ++It)
   {
       std::cout<<*It<<' ';
   }
   return 0;
}

std::set_intersection(Vec1.begin(), Vec1.end(), Vec2.begin(), Vec2.end(), std::back_inserter(Vec3));

std::set_symmetric_difference(Vec1.begin(), Vec1.end(), Vec2.begin(), Vec2.end(), std::back_inserter(Vec3));

#include <iostream>
#include <algorithm>
#include <vector>
#include <iterator>
 
int main()
{
   int Arr1[]={1,2,3,4,5};
   int Arr2[]={1,2,3,4,6};
   std::vector<int> Vec1(Arr1, Arr1+sizeof(Arr1)/sizeof(Arr1[0]));
   std::vector<int> Vec2(Arr2, Arr2+sizeof(Arr2)/sizeof(Arr2[0]));
   std::vector<int> Vec3;
   std::set_intersection(Vec1.begin(), Vec1.end(), Vec2.begin(), Vec2.end(), std::back_inserter(Vec3));
   std::copy(Vec3.begin(), Vec3.end(), std::ostream_iterator<int>(std::cout, " "));
   return 0;
}