How would you emulate encapsulation and inheritance though?
Actually, encapsulation is the easiest part. Encapsulation is a design philosophy, it has nothing at all to do with the language and everything to to with how you think about problems.
For example, the Windows FILE api is completely encapsulated. When you open a file, you get back an opaque object that contains all of the state information for the file 'object'. You hand this handle back to each of the file io apis. The encapsulation is actually much better than C++ because there is no public header file that people can look at and see the names of your private variables.
Inheritance is harder, but it isn't at all necessary in order for your code to be object oriented. In some ways aggregation is better than inheritance anyway, and aggregation is just as easy in C as in C++. see this for instance.
In response to Neil see Wikipedia for an explanation of why inheritance isn't necessary for polymorphism.
Us old-timers wrote object oriented code years before C++ compilers were available, it's a mind-set not a tool-set.
