c++ STL之 multimap 的个性（权哥）

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/*multimap的个性：允许重复key元素是key/value对不支持方括号下标*/#include <map>#include <iostream>using namespace std;#include "print.h"#include <string>int main(){typedef multimap<string,double> MSD;MSD m;m.insert(MSD::value_type("WG",100000)); m.insert(make_pair("HJJ",120000)); m.insert(make_pair("YY",20000));m.insert(make_pair("HJJ",160000)); m.insert(make_pair("YY",3000));m.insert(MSD::value_type("WG",220000)); m.insert(MSD::value_type("WG",150000));m.insert(make_pair("HJJ",130000)); m.insert(make_pair("YY",1000000));m.insert(make_pair("YY",110000));print(m.begin(), m.end());MSD::iterator ib = m.begin(), ie;MSD cnt;while(ib!=m.end()){string name = ib->first;ie = m.upper_bound(name);double sum = 0.0;while(ib!=ie) sum += ib++->second;cnt.insert(make_pair(name,sum*0.03));}print(cnt.begin(),cnt.end());}/*输出：HJJ:120000 HJJ:160000 HJJ:130000 WG:100000 WG:220000 WG:150000 YY:20000 YY:3000 YY:1e+06 YY:110000 HJJ:12300 WG:14100 YY:33990 */

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