how to load files saved as following formats into openGL application--need help!

how to import(load) “objects” into an OpenGL application that are saved in the following file format:
.obj),Render(.slp),VRML(.wrl),ACIS File(.sat),
Could you give me some examples or source codes ,or give me some clue about that?I need them in a hurry.Thank you very much! Please help me!

opengl doesn’t deal with files, it just renders polygons. You need to look up the file format (try and then read in the vertices using file I/O. Then render those vertices.