multiset-count

////////////////////////////////////////
//      2018/04/30 8:50:14
//      multiset-count

// returns the number of elements
#include <iostream>
#include <set>

using namespace std;

void print(multiset<int, less<int>>&s){
    multiset<int, less<int>>::iterator it;
    for (it = s.begin(); it != s.end(); it++){
        cout << *it << " ";
    }
    cout << endl;
}
//=========================

int main(){
    int ary[] = { 1, 2, 3, 2, 3, 4, 8, 2, 5, 6 };
    multiset<int, less<int>> s;

    s.insert(ary, ary + 10);
    print(s);

    cout << "count of '2' is ";
    int n = s.count(2);
    cout << n << endl;
    return 0;
}

/*
OUTPUT:
    1 2 2 2 3 3 4 5 6 8
    count of '2' is 3
*/