object.c

/* Cascaded function calls in C */
#include <stdio.h>
#include <stdlib.h>

typedef struct Object Object;

struct Object {
    Object* (*foo)(Object*);
};

static Object* foo(Object* obj)
{
    printf("Hello World!\n");
    return obj;
}

static Object* createObject(void)
{
    Object* obj = (Object*) malloc(sizeof(Object));
    obj->foo = foo;
    return obj;
}

int main(int argc, char* argv[])
{
    Object* obj = createObject();
    obj->foo(obj)->foo(obj)->foo(obj)->foo(obj);
    return 0;
}