The following code example is taken from the book
C++ Templates - The Complete Guide
by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
© Copyright David Vandevoorde and Nicolai M. Josuttis 2002
#ifndef ACCUM_HPP
#define ACCUM_HPP
#include <iterator>
template <typename Iter>
inline
typename std::iterator_traits<Iter>::value_type
accum (Iter start, Iter end)
{
typedef typename std::iterator_traits<Iter>::value_type VT;
VT total = VT(); // assume VT() actually creates a zero value
while (start != end) {
total += *start;
++start;
}
return total;
}
#endif // ACCUM_HPP