max_element 返回值上限与下限

#include <iostream>

#include <algorithm>

#include <list>
using namespace std;
//using namespace std::list;
//using namespace std::cout;
//using namespace std::endl;

int main(int argc, char** argv)
{
    typedef list<int> IntList;

    IntList coll;
    for(int i=20; i<40; ++i)
    {
        coll.push_back(i);
    }

    list<int>::iterator pos25, pos35;
    pos25 = find(coll.begin(), coll.end(), 25);
    cout<<*pos25<<endl; // 25
    pos35 = find(coll.begin(), coll.end(), 35);
    cout<<*pos35<<endl;  // 35

        // 注意:max_element返回的值是34，而不是35.
    cout<<"max = "<< *max_element(pos25, pos35)<<endl;

    return 0;
}