#include <iostream>

#include <map>

#include <string>

using namespace std;

int main()

{

　　map<int, string> map1;

　　multimap<int, string> multimap1;

　　map1.insert(map<int,string>::value_type(1,"One"));

　　map1.insert(map<int, string>::value_type(2, "Two"));

　　map1.insert(map<int, string>::value_type(3, "Three"));

　　map1.insert(make_pair(-1,"Minus One"));

　　map1.insert(pair<int,string>(1000,"Four"));

　　map1[100] = "Five";

　　cout << "map1 size:" << map1.size() << endl;

　　map<int, string>::const_iterator map_iter;

　　for (map_iter =map1.begin();map_iter !=map1.end();++map_iter)

　　{

　　　　cout << "key:" << map_iter->first << " value:" << map_iter->second.c_str() << endl;

　　}

　　cout << "---------------------------"<< endl;

　　multimap1.insert(multimap<int,string>::value_type(1,"One"));

　　multimap1.insert(multimap<int, string>::value_type(1, "One"));

　　multimap1.insert(multimap<int, string>::value_type(2, "Two"));

　　multimap1.insert(pair<int,string>(2,"Test"));

　　multimap1.insert(pair<int,string>(2,"Test2"));

　　multimap1.insert(make_pair<int,string>(3,"Test"));

　　cout << "multimap size:" << multimap1.size() << endl;

　　multimap<int, string>::const_iterator multimap_iter;

　　for (multimap_iter = multimap1.begin();multimap_iter != multimap1.end();++multimap_iter)

　　{

　　　　cout << "key:" << multimap_iter->first << " value:" << multimap_iter->second.c_str() << endl;

　　}

　　cout << "element count:" << multimap1.count(1) << endl;

　　cout << "-----------------------------------------" << endl;

　　multimap<int, string>::const_iterator iter2;

　　iter2 = multimap1.find(2);

　　if (iter2 != multimap1.end())

　　{

　　　　size_t element_count = multimap1.count(2);

　　　　for (int k=0;k<element_count;k++)

　　　　{

　　　　　　cout << "find: "<<k<<" " << iter2->first << " " << iter2->second.c_str() << endl;

　　　　　　++iter2;

　　　　}

　　　　

　　}

　　else

　　{

　　　　cout << "not found..." << endl;

　　}

　　cout << "---------------------------------------------"<<endl;

　　if (multimap1.erase(2)>0)

　　{

　　　　cout << "delete element success..."<<endl;

　　}

　　multimap<int, string>::const_iterator multimap_iter1;

　　for (multimap_iter1 = multimap1.begin(); multimap_iter1 != multimap1.end(); ++multimap_iter1)

　　{

　　　　cout << "key:" << multimap_iter1->first << " value:" << multimap_iter1->second.c_str() << endl;

　　}

　　cout << "---------------------------------------------" << endl;

　　multimap<int, string>::iterator iter3 = multimap1.find(1);

　　if (iter3 != multimap1.end())

　　{

　　　　size_t element_count = multimap1.count(1);

　　　　for (int k=0;k<element_count;k++)

　　　　{

　　　　　　iter3 = multimap1.find(1);

　　　　　　multimap1.erase(iter3);

　　　　　　//++iter3;

　　　　　　cout << "delete success..." << endl;

　　　　}

　　}

　　cout << "---------------------------------------------" << endl;

　　multimap<int, string>::const_iterator multimap_iter2;

　　for (multimap_iter2 = multimap1.begin(); multimap_iter2 != multimap1.end(); ++multimap_iter2)

　　{

　　　　cout << "key:" << multimap_iter2->first << " value:" << multimap_iter2->second.c_str() << endl;

　　}

　　system("pause");

　　return 0;

}

 

====================================== 

 

map1 size:6

key:-1 value:Minus One

key:1 value:One

key:2 value:Two

key:3 value:Three

key:100 value:Five

key:1000 value:Four

---------------------------

multimap size:6

key:1 value:One

key:1 value:One

key:2 value:Two

key:2 value:Test

key:2 value:Test2

key:3 value:Test

element count:2

-----------------------------------------

find: 0 2 Two

find: 1 2 Test

find: 2 2 Test2

---------------------------------------------

delete element success...

key:1 value:One

key:1 value:One

key:3 value:Test

---------------------------------------------

delete success...

delete success...

---------------------------------------------

key:3 value:Test

请按任意键继续. . .