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
#include "accum8.hpp"
#include <iostream>
template<typename T1, typename T2>
class MultPolicy {
public:
static void accumulate (T1& total, T2 const& value) {
total *= value;
}
};
int main()
{
// create array of 5 integer values
int num[] = { 1, 2, 3, 4, 5 };
// print average value
std::cout << "the average value of the integer values is "
<< Accum<int>::accum(&num[0], &num[5]) / 5
<< '\n';
// print product of all values
std::cout << "the product of the integer values is "
<< Accum<int,MultPolicy>::accum(&num[0], &num[5])
<< '\n';
// create array of character values
char name[] = "templates";
int length = sizeof(name)-1;
// (try to) print average character value
std::cout << "the average value of the characters in \""
<< name << "\" is "
<< Accum<char>::accum(&name[0], &name[length]) / length
<< '\n';
}