std::vector erase 没有清除对象的问题

//vector 存储对象的时候删除后释放内存，存储对象指针的时候删除后并不释放内存

#include <iostream>
#include <vector>

using namespace std;

class Test
{
public:
Test(int i) ;
~Test() ;

private:
int id;
};

Test::Test(int i)
{
id = i;
printf("%d construct\n",i);
}

Test::~Test()
{
printf("%d destruct\n",id);
}

int main() {
vector<Test> vec1;
for (int i = 0; i < 3; i++)vec1.push_back( Test(i));
printf("before erase\n");
vec1.clear();
printf("after erase\n\n");

vector<Test*> vec2;
for (int i = 0; i < 3; i++)vec2.push_back(new Test(i));
printf("before erase\n");
vec2.clear();
printf("after erase\n\n");

vector<Test*> vec3;
for (int i = 0; i < 3; i++)vec3.push_back(new Test(i));
for (int i = 0; i < 3; i++)delete vec3[i];
printf("before erase\n");
vec3.clear();
printf("after erase\n\n");

system("pause");
return 0;
}