Mega Code Archive
Illustrating the use of an adaptor for pointers to functions
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//Revised from
//STL Tutorial and Reference Guide C++ Programming with the Standard Template L
ibrary, 2nd Edition
//by David R. Musser (Author), Atul Saini (Author)
//# Publisher: Addison-Wesley Pub (Sd) (March 1996)
//# Language: English
//# ISBN-10: 0201633981
//# ISBN-13: 978-0201633986
#include <iostream>
#include <string>
#include <set>
using namespace std;
bool less1(const string& x, const string& y)
{
return x < y;
}
bool greater1(const string& x, const string& y)
{
return x > y;
}
int main()
{
typedef set<string, pointer_to_binary_function<const string&, const string&,bool> > set_type1;
set_type1 set1(ptr_fun(less1));
set1.insert("the");
set1.insert("quick");
set1.insert("brown");
set1.insert("fox");
set_type1::iterator i;
for (i = set1.begin(); i != set1.end(); ++i)
cout << *i << " ";
cout << endl;
set_type1 set2(ptr_fun(greater1));
set2.insert("the");
set2.insert("quick");
set2.insert("brown");
set2.insert("fox");
for (i = set2.begin(); i != set2.end(); ++i)
cout << *i << " ";
cout << endl;
return 0;
}
brown fox quick the
the quick fox brown
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