multiset-clear

////////////////////////////////////////
//      2018/04/30 8:45:39
//      multiset-clear

// removes all 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);

    s.clear();
    cout << "Size of multiset s = " << s.size() << endl;
    print(s);
    return 0;
}


/*
OUTPUT:
    1 2 2 2 3 3 4 5 6 8
    Size of multiset s = 0
    这里是一个空行
*/