Yaba code

main.cpp

#include <vector>

class Foo;

class Manage
{
private:
	std::vector<Foo> m_vec;
    
public:
	Manage(){};
	~Manage(){};
    
	void PushObj( Foo& obj ){ m_vec.push_back(obj); };
};

int main()
{
	Manage manager;
	Foo hoge;
	manager.PushObj(hoge);
}