【STL】-迭代器的用法

初始化：

list<char>::iterator pos;

算法：

1. 遍历

　　for(pos = col1.begin(); pos != col1.end(); ++pos){...}

代码：

#include <iostream>
#include <vector>
#include <deque>
#include <set>
#include <algorithm>
#include <iterator> //for ostream_iterator&istream_iterator
#include "utility.h"
using namespace std;

int main() {
    vector<int> v;
    vector<int>::iterator pos;

    for(int i = 6; i >= 1; i--)
        v.push_back(i);

    //back_inserter调用push_back(), 适用于vector, deque, list
    vector<int> col1;
    copy(v.begin(), v.end(), back_inserter(col1));
    PRINT_ELEMENT(col1);

    //front_inserter调用push_front()，适用于deque, list
    deque<int> col2;
    copy(v.begin(), v.end(), front_inserter(col2));
    PRINT_ELEMENT(col2);

    //inserter调用inserter(), 适用于所有容器
    set<int> col3;
    copy(v.begin(), v.end(), inserter(col3, col3.end()));
    PRINT_ELEMENT(col3);

    //ostream iterator
    copy(col3.rbegin(), col3.rend(), ostream_iterator<int>(cout, " "));
    cout << endl;

    //istream iterator
    vector<string> col4;
    copy(istream_iterator<string>(cin), istream_iterator<string>(), back_inserter(col4));
    PRINT_ELEMENT(col4);
    return 0;
}

输出：

$ ./a.exe
content:
6 5 4 3 2 1
content:
1 2 3 4 5 6
content:
1 2 3 4 5 6
6 5 4 3 2 1
abd adfasdf assdfasdf afewaf 1a `1111 adsfasdf
content:
abd adfasdf assdfasdf afewaf 1a `1111 adsfasdf