multimap

#include <iostream>using namespace std;#include <map>#include <string>typedef multimap<string, string> M;int main(){M mss;M::iterator ib ,ie;mss.insert(make_pair("aa", "bb"));mss.insert(make_pair("cc", "dd"));mss.insert(make_pair("ee", "ff"));mss.insert(make_pair("cc", "pp"));mss.insert(make_pair("aa", "mm"));mss.insert(make_pair("cc", "dd"));mss.insert(make_pair("aa", "kk"));ib = mss.begin();ie = mss.end();while(ib!=ie){cout << ib->first << "的好友" << ib->second << endl;++ib; }cout << "aa的好友数量：" << mss.count("aa") << endl; cout << "cc的所有好友：" << endl;ib = mss.lower_bound("cc");ie = mss.upper_bound("cc");while(ib!=ie){cout << ib->second<< ' ';++ib;}cout << endl;return 0;}