/* The following code example is taken from the book * "The C++ Standard Library - A Tutorial and Reference" * by Nicolai M. Josuttis, Addison-Wesley, 1999 * * (C) Copyright Nicolai M. Josuttis 1999. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */ #include "algostuff.hpp" using namespace std; bool isEven (int elem) { return elem % 2 == 0; } int main() { vector coll; int num; INSERT_ELEMENTS(coll,1,9); PRINT_ELEMENTS(coll,"coll: "); // count and print elements with value 4 num = count (coll.begin(), coll.end(), // range 4); // value cout << "number of elements equal to 4: " << num << endl; // count elements with even value num = count_if (coll.begin(), coll.end(), // range isEven); // criterion cout << "number of elements with even value: " << num << endl; // count elements that are greater than value 4 num = count_if (coll.begin(), coll.end(), // range bind2nd(greater(),4)); // criterion cout << "number of elements greater than 4: " << num << endl; }