stl 学习笔记 8 续 （function object）

function object 续

//stl/fo1.cpp

/**//*
预先定义好的  function object

*/
#include <iostream>
#include <set>
#include <deque>
#include <algorithm>
#include "print.h"
using namespace std;

int main()
...{
    set<int,greater<int> > coll1;
    deque<int> coll2;

    for(int i = 1; i<=9;++i)
        coll1.insert(i);

    PRINT_ELEMENTS(coll1,"initialized: ");

    // bind2nd
    // function adaptors
    transform(coll1.begin(),coll1.end(),
        back_inserter(coll2),bind2nd(multiplies<int>(),10));

    PRINT_ELEMENTS(coll2,"transformed: ");

    // replace_if (algorithm)
    replace_if(coll2.begin(),coll2.end(),
        bind2nd(equal_to<int>(),70),42);

    PRINT_ELEMENTS(coll2,"replaced: ");

    coll2.erase(remove_if(coll2.begin(),coll2.end(),
        bind2nd(less<int>(),50)),coll2.end());

    // less<> function object
    PRINT_ELEMENTS(coll2,"removed: ");
}