Re: Object orientation.....


"Vishal Naidu" <naiduvishal@xxxxxxxxx> wrote
> is it really possible to write object oriented code in C ?
> and if yes how do we achieve abstration, polymorhism , hierarchy etc.
> in C
>
The advantage of using C rather than an object-oriented language is that you
get to decide the protocol.

For instnace you could define a struct OBJECT
typedef struct
{
void **interfaces;
char **interfacenames;
in Ninterfaces;
} OBJECT;

Then you can have a function void *get_interface(OBJECT *obj, char *name)

This queries the object for an interface, and returns it.

eg
typedef struct
{
void *draw(unsigned char *rgb, int width, int height, int x, int y);
} DRAWABLE;

Thus you build your object from interfaces.



.

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