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 "algostuff.hpp"
using namespace std;
bool bothEvenOrOdd (int elem1, int elem2)
{
return elem1 % 2 == elem2 % 2;
}
int main()
{
vector<int> coll1;
list<int> coll2;
deque<int> coll3;
coll1 = { 1, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
coll2 = { 1, 9, 8, 7, 6, 5, 4, 3, 2, 1 };
coll3 = { 11, 12, 13, 19, 18, 17, 16, 15, 14, 11 };
PRINT_ELEMENTS(coll1,"coll1: ");
PRINT_ELEMENTS(coll2,"coll2: ");
PRINT_ELEMENTS(coll3,"coll3: ");
// check whether both collections have equal elements in any order
if (is_permutation (coll1.cbegin(), coll1.cend(), // first range
coll2.cbegin())) { // second range
cout << "coll1 and coll2 have equal elements" << endl;
}
else {
cout << "coll1 and coll2 don't have equal elements" << endl;
}
// check for corresponding number of even and odd elements
if (is_permutation (coll1.cbegin(), coll1.cend(), // first range
coll3.cbegin(), // second range
bothEvenOrOdd)) { // comparison criterion
cout << "numbers of even and odd elements match" << endl;
}
else {
cout << "numbers of even and odd elements don't match" << endl;
}
}