迭代器的使用

最新推荐文章于 2024-07-29 16:25:35 发布

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最新推荐文章于 2024-07-29 16:25:35 发布

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分类专栏： C/C++ STL 文章标签：迭代器 iterator

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几种迭代器 ostream_iterator , back_insert_iterator ,insert_iterator 的用法如下：

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

using namespace std;

int main()
{
    char a[6]={'a','b','c','d','f','g'};
    vector <char> b(6);
    copy(a,a+6,b.begin());
    ostream_iterator <char ,char> out(cout," ");

    cout<<"Positive order: ";
    copy(b.begin(),b.end(),out);
    cout<<endl;

    cout<<"Reserve order: ";
    copy(b.rbegin(),b.rend(),out);
    cout<<endl;

    cout<<"Insert behind: ";
    char c[4]={'h','i','j','k'};
    copy(c,c+3,back_insert_iterator<vector <char> >(b));
    copy(b.begin(),b.end(),out);
    cout<<endl;

    cout<<"Insert in front: ";
    copy(c,c+2,insert_iterator<vector<char> >(b,b.begin()+2));
    copy(b.begin(),b.end(),out);
    cout<<endl;

    return 0;
}