Set with functor for string comparison : string compare « string « C++ Tutorial

1. C++ Tutorial
2. string
3. string compare

#include <iostream>
#include <set>
#include <string>
#include <functional>
#include <cassert>

using namespace std;

struct strPtrLess {
   bool operator( )(const string* p1,const string* p2) {
      return(*p1 < *p2);
   }
};

int main( ) {
   set<string*, strPtrLess> setStrPtr;  // less-than functor
   string s1 = "T";
   string s2 = "D";
   string s3 = "H";

   setStrPtr.insert(&s1);
   setStrPtr.insert(&s2);
   setStrPtr.insert(&s3);

   for (set<string*, strPtrLess>::const_iterator p = setStrPtr.begin( ); p != setStrPtr.end( ); ++p)
      cout << **p << endl;

}

D
H
T