#include<iostream>
using  namespace std;

template<typename T>  struct sum_traits;


template<>  struct sum_traits<char> {
typedef int sum_type; 
};
template<>  struct sum_traits<int> {
typedef long int sum_type; 
};
template<>  struct sum_traits<float> {
typedef double sum_type; 
};
template<>  struct sum_traits<double> {
typedef double sum_type; 
};

template<typename T> 
typename sum_traits<T>::sum_type sum(T *beg,T *end) { 
  typedef typename sum_traits<T>::sum_type sum_type;
  sum_type total = sum_type(); 
  while(beg != end ) { 
    total += *beg; beg++; 
  } 
  return total; 
};


main() {
char name[]="@ @ @";
int length=strlen(name);

 cout<<sum(name,&name[length])<<endl;
}