Re: deleting dynamically allocated objects in a container

Suppose 'Test' is a class. I dynamically allocate few 'Test'
objects and push them into a vector<Test*>. I want to delete
the dynamically allocated 'Test' objects using a Standard
Library Algorithm instead of writing a hand-written 'for
loop'.

Following is my attempt: (I am using cout statements in the
ctor and dtor only for understanding purpose).

#include <cstdlib>
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

class Test
{
public:
        explicit Test(int arg = 0);
        ~Test();
private:
        int val;
};

inline Test::Test(int arg) : val(arg)
{
        cout << "From Test ctor: " << val << endl;
}

inline Test::~Test()
{
        cout << "From Test dtor: " << val << endl;
}

inline void delete_pointer(Test* & arg)
{
        delete arg;
        arg = 0;

}

int main()
{
        typedef vector<Test*> Container;
        Container c;
        c.push_back(new Test(100));
        c.push_back(new Test(200));
        c.push_back(new Test(300));
        for_each(c.begin(), c.end(), delete_pointer);
        // just to ensure the element values are zero, print them
        cout << c[0] << " " << c[1] << " " << c[2] << endl;
        return EXIT_SUCCESS;
}

This porgram compiles fine with g++ and when run, produces the output:
From Test ctor: 100
From Test ctor: 200
From Test ctor: 300
From Test dtor: 100
From Test dtor: 200
From Test dtor: 300
0 0 0

My solution seems to work. But is there a better solution ?

My question is: in real-world applications, how do the
dynamically allocated objects stored in a container deleted?