Extracting Bulk data's using C++ from oracle ( Oracle version & platform indeppendent)

Hey, here's my problem. Its like I need to bulk extract data's from the oracle database using C++ preferably. The Oracle version might range from 6 & above. So should be version independent & also it has to be plaform independent, like got to be compatible with unix-hp, sun-solaris,windows, IBM etc. Pls do suggest the right way & also which flavour of C++ I would use & if there is any classes that I can use to interact with the oracle database irrespective of the version above 6.
Thanks in advance & have a good day.