STL 之multimap

 #include <map>
#include <iostream>
#include <string>
using namespace std;
typedef multimap<string,string>::value_type CIT;
typedef multimap<string,string>::const_iterator IT;
template<class T1,class T2>
void show(IT&it,multimap<T1,T2>&r)
{
 for (it=r.begin();it!=r.end();++it)
 {
  cout<<it->first<<"\t"<<it->second<<"\n";
 }
}
int main()
{
 multimap<string,string>phone;
 phone.insert(CIT ("朱然","0108225634"));
 phone.insert(CIT("朱然","8708532"));
 phone.insert(CIT("朱然","13583852314"));
 IT ii;
 cout<<"遍历并输出所有元素...\n";
 show(ii,phone);
 cout<<"查找关键字为“朱然”的所有数据：\n";
 //ii=phone.find("朱然");
 typedef pair<IT, IT> PAIR;
 PAIR p=phone.equal_range("朱然");
 for(IT i=p.first; i!=p.second; ++i)
 {
  cout<<i->first<<"\t"<<i->second<<endl;
 }
 system("pause");
 return 0;
}