mset5.cpp

mset5.cpp

#include ‹iostream.h›

#include ‹stl.h›

bool less_than(int a_, int b_) {

 return a_ ‹ b_;

}

bool greater_than(int a_, int b_) {

 return a_ › b_;

}

int array[] = {3, 6, 1, 9};

int main() {

 typedef pointer_to_binary_function‹int, int, bool› fn_type;

 typedef multiset‹int, fn_type› mset;

 fn_type f(less_than);

 mset s1(array, array + 4, f);

 mset::const_iterator i = s1.begin();

 cout ‹‹ "Using less_than: " ‹‹ endl;

 while (i != s1.end()) cout ‹‹ *i++ ‹‹ endl;

 fn_type g(greater_than);

 mset s2(array, array + 4, g);

 i = s2.begin();

 cout ‹‹ "Using greater_than: " ‹‹ endl;

 while (i != s2.end()) cout ‹‹ *i++ ‹‹ endl;

 return 0;

}