multimap的迭代器的使用

来源：互联网发布：真正的坏女人魅力知乎编辑：程序博客网时间：2024/05/21 22:31

multimap使用工程中，迭代器的使用经常让人费解，下面进行了总结，值得关注。程序可在codeblocks中正常运行

#include <iostream>#include <stack>#include <queue>#include<map>using namespace std;int main(){    multimap<string,string> book;    book.insert(make_pair("wanglibao","C++"));    book.insert(make_pair("wanglibao3","java"));    book.insert(make_pair("wanglibao","HTMl5"));    book.insert(make_pair("wanglibao2","java2"));    book.insert(make_pair("wanglibao2","java1"));    multimap<string,string>::size_type size;    size = book.count("wanglibao");    cout << size <<endl;    multimap<string,string>::iterator map_it = book.find("wanglibao");    for(int i = 0; i < size; i++) {        cout << map_it->second <<endl;        map_it++;               //该迭代器只指向find的值对应的项目    }    cout<< endl;    multimap<string,string>::iterator m_e = book.upper_bound("wanglibao2");    multimap<string,string>::iterator m_s = book.lower_bound("wanglibao");    while (m_s != m_e) {            //迭代器中只包含wanglibao2，wanglibao对应的项        cout << m_s->second<<endl;        ++m_s;    }    return 0;}