Python instance method in C

Question

Consider the following Python (3.x) code:

class Foo(object):
    def bar(self):
        pass
foo = Foo()

How to write the same functionalit

Answer 1

You can't! C does not have "classes", it only has structs. And a struct cannot have code (methods or functions).

You can, however, fake it with function pointers:

/* struct object has 1 member, namely a pointer to a function */
struct object {
    int (*class)(void);
};

/* create a variable of type `struct object` and call it `new` */
struct object new;
/* make its `class` member point to the `rand()` function */
new.class = rand;

/* now call the "object method" */
new.class();