void TestFind(Container_t<T>& _obj)
{
	if(_obj.Count() == 0)
	{
		cout<<"no items"<<endl;
		return;
	}
	cout<<"please choose an index(0-"<<(_obj.Count()-1)<<")"<<endl;
	int index;
	cin>>index;
	try
	{
		T item = _obj.Find(index);
		cout<<"found item is "<< item <<endl;		
	}
	catch(TException_t<int>& err)
	{
		cout<<err.GetDesCription();
	}
}
void TestCount(Container_t<T>& _obj)
{
	cout<<"num of items is: "<<_obj.Count()<<endl;
}