vector of shared_prt or shared_ptr of vector in c++

test_vector_and_shared_ptr.cpp

#include <iostream>
#include <memory>
#include <vector>

class TestClass {
  public:
	TestClass(int id);
	~TestClass();

  public:
	int id;
};

void testNormalFunction(std::vector<TestClass> vector) {}
void testSharedVectorFunction(std::shared_ptr<std::vector<TestClass>> vector) {}
void testVectorSharedFunction(std::vector<std::shared_ptr<TestClass>> vector) {}
int main()
{
	std::vector<TestClass> normalVector;
	normalVector.push_back(TestClass(1));
	testNormalFunction(normalVector);

	std::shared_ptr<std::vector<TestClass>> sharedVector(
	std::make_shared<std::vector<TestClass>>());
	sharedVector->push_back(TestClass{2});
	testSharedVectorFunction(sharedVector);

	std::vector<std::shared_ptr<TestClass>> vectorShared;
	vectorShared.push_back(std::make_shared<TestClass>(3));
	testVectorSharedFunction(vectorShared);

	return 0;
}
TestClass::TestClass(int id) : id(id)
{
	std::clog << "created : " << id << std::endl;
}

TestClass::~TestClass() { std::clog << "destroyed : " << id << std::endl; }