#include <iostream>
#include <algorithm>
#include <vector>
 
using Iterator=std::vector<int>::iterator;
template<class Func>
void foo(Iterator begin,Iterator end,Func f)
{
    for(Iterator it=begin; it != end-1;++it)
    {
         auto f2=[&begin,&f](int& lhs,int& rhs){
            std::cout<<&(*begin)<<"\n"<<&lhs<<"  "<<&rhs;
            f(lhs,rhs);
        };
 
         f2(*it,*(it+1));
    }
}
 
int main()
{
    std::vector<int> a{1,5,3,4,7};
 
    foo(a.begin(),a.end(),[](int& lhs,int& rhs){
        std::cout<<"\n"<<&lhs<<"  "<<&rhs<<"\n\n\n";
    });
}
 

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