#include <iostream>
#include <vector>
using namespace std;

class human{
public:
    human(){
        cout<< "construct human"<<endl;
    }
    ~human(){
        cout<< "Destruct human"<<endl;
    }
};

class man : public human{
public:
    man(){
        cout<< "construct man"<<endl;
    }
    ~man(){
        cout<< "destruct man"<<endl;
    }
};

void del (vector <human*>& v){
    v.erase(v.begin(), v.end());
}

int main()
{
    human a, b;
    man c, d;

    vector<human*> v;

    v.push_back(&a);
    v.push_back(&b);
    v.push_back(&c);
    v.push_back(&d);
    del(v);
    return 0;
}