How to put blender models in c++ or irilicht game engine

what filetype should i export the models as?

I think for Irrlicht it can be .obj and .3ds

…I think. Not sure.

Although this should have been posted on an Irrlicht forum. =]

How about .dae?

Scene exporter to irrlicht format: http://code.google.com/p/tubras/wiki/irrb

For animated models you might want to use directx format (.x).