#include <iostream>

 #include <string>

 #include <boost/bind.hpp>

 #include <boost/function.hpp>

 #include <vector>

 #include <algorithm>

 #include <functional>

 #include <stdlib.h>

 using namespace std;

 using namespace boost;

 void print(std::ostream &os,int i)

 {

     os << i << endl;

 }

 void mainF()

 {

     //不可以拷贝的对象可以用ref

     boost::function<void(int)> pt = boost::bind(print,boost::ref(cout), _1);

     vector<int > v;

     v.push_back();

     v.push_back();

     v.push_back();

     for_each(v.begin(), v.end(), pt);

     std::cin.get();

 }