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: ");


}