The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <iostream>
#include <string>
// PRINT_ELEMENTS()
// - prints optional string optstr followed by
// - all elements of the collection coll
// - in one line, separated by spaces
template <typename T>
inline void PRINT_ELEMENTS (const T& coll,
const std::string& optstr="")
{
std::cout << optstr;
for (const auto& elem : coll) {
std::cout << elem << ' ';
}
std::cout << std::endl;
}