example_13_14.cpp

data+structures+using+c的源码

//STL functions swap, iter_swap, and swap_ranges

#include <iostream>
#include <algorithm>
#include <vector>
#include <iterator>

using namespace std;

int main()
{
    char cList[10] = {'A', 'B', 'C', 'D', 'F', 
                      'G', 'H', 'I', 'J', 'K'};        //Line 1

    vector<char> charList(cList, cList + 10);          //Line 2
    vector<char>::iterator  charItr;                   //Line 3
 
    ostream_iterator<char> screen(cout, " ");          //Line 4

    cout<<"Line 5: Character list: ";                 //Line 5
    copy(charList.begin(), charList.end(), screen);   //Line 6
    cout<<endl;                                       //Line 7
        //swap
    swap(charList[0], charList[1]);                   //Line 8

    cout<<"Line 9: Character list after swapping the "
        <<"first and second elements: "<<endl;         //Line 9
    copy(charList.begin(), charList.end(), screen);    //Line 10
    cout<<endl;                                        //Line 11
         //iter_swap
    iter_swap(charList.begin() + 2, 
              charList.begin() + 3);                   //Line 12

    cout<<"Line 13: Character list after swapping the "
        <<"third and fourth elements: "<<endl;         //Line 13
    copy(charList.begin(), charList.end(), screen);    //Line 14
    cout<<endl;                                        //Line 15

    charItr = charList.begin() + 4;                    //Line 16
    iter_swap(charItr, charItr + 1);                   //Line 17

    cout<<"Line 18: Character list after swapping the "
        <<"fifth and sixth elements: "<<endl;          //Line 18
    copy(charList.begin(), charList.end(), screen);    //Line 19
    cout<<endl<<endl;                                  //Line 20

    int list[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};    //Line 21

    vector<int> intList(list, list + 10);              //Line 22

    ostream_iterator<int> screenOut(cout, " ");        //Line 23

    cout<<"Line 24: intList: ";                        //Line 24
    copy(intList.begin(), intList.end(), screenOut);   //Line 25
    cout<<endl;                                        //Line 26

           //swap_ranges
    swap_ranges(intList.begin(), intList.begin() + 4, 
                intList.begin() + 5);                  //Line 27
 
    cout<<"Line 28: intList after swapping the first "
        <<"four elements with the \n          four elements "
        <<"starting at the sixth element of intList: "
        <<endl;                                        //Line 28
    copy(intList.begin(), intList.end(), screenOut);   //Line 29
    cout<<endl;                                        //Line 30

    swap_ranges(list, list + 10, intList.begin());     //Line 31
 
    cout<<"Line 32: list and intList after swapping "
        <<"the elements with each other: "<<endl;      //Line 32
    cout<<"Line 33: list: ";                           //Line 33
    copy(list, list + 10, screenOut);                  //Line 34
    cout<<endl;                                        //Line 35
    cout<<"Line 36: intList: ";                        //Line 36
    copy(intList.begin(), intList.end(), screenOut);   //Line 37
    cout<<endl;                                        //Line 38

    return 0;
}