multimap-erase

////////////////////////////////////////
//      2018/05/04 9:56:28
//      multimap-erase

// removes elements
#include <iostream>
#include <map>
#include <string>

using namespace std;

typedef multimap<string, int, less<string>>  M;

void print(M& m){
    M::iterator it = m.begin();
    cout << "multimap:" << endl;
    while (it != m.end()){
        cout << it->first << "-" << it->second << endl;
        it++;
    }
}
//========================
int main(){

    typedef M::value_type v_t;
    M m;

    m.insert(v_t("AAA",1));
    m.insert(v_t("BBB",2));
    m.insert(v_t("CCC",3));
    m.insert(v_t("EEE",4));
    m.insert(v_t("CCC",5));
    m.insert(v_t("DDD",6));

    print(m);

    M::iterator it;
    it = m.find("DDD");
    // remove element pointed by it
    m.erase(it);
    print(m);

    it = m.find("CCC");
    // remove the range of elements
    m.erase(m.begin(), it);
    print(m);

    return 0;
}

/*
OUTPUT:
    multimap:
    AAA-1
    BBB-2
    CCC-3
    CCC-5
    DDD-6
    EEE-4
    multimap:
    AAA-1
    BBB-2
    CCC-3
    CCC-5
    EEE-4
    multimap:
    CCC-3
    CCC-5
    EEE-4
*/