How to manage scene?? Directx, c++

See more:

C++

DirectX

hello,

can anybodody suggest me about scene's management,please?

usually, i use if statement and flag to control scenes.
however, when objects are too many, my way is kinda of messy.

then, i think of use pointer to point function but
i am not good at pointer, kinda of confusing.

in directX, there are some kinds of functions to help about scene's management??