eqrange1.cpp

stl自带源码

/* The following code example is taken from the book
 * "The C++ Standard Library - A Tutorial and Reference"
 * by Nicolai M. Josuttis, Addison-Wesley, 1999
 *
 * (C) Copyright Nicolai M. Josuttis 1999.
 * Permission to copy, use, modify, sell and distribute this software
 * is granted provided this copyright notice appears in all copies.
 * This software is provided "as is" without express or implied
 * warranty, and with no claim as to its suitability for any purpose.
 */
#include "algostuff.hpp"
using namespace std;

int main()
{
    list<int> coll;

    INSERT_ELEMENTS(coll,1,9);
    INSERT_ELEMENTS(coll,1,9);
    coll.sort ();
    PRINT_ELEMENTS(coll);

    // print first and last position 5 could get inserted
    pair<list<int>::iterator,list<int>::iterator> range;

    range = equal_range (coll.begin(), coll.end(),
                         5);

    cout << "5 could get position "
         << distance(coll.begin(),range.first) + 1
         << " up to "
         << distance(coll.begin(),range.second) + 1
         << " without breaking the sorting" << endl;
}