Functional(ish) Fibonacci in C :)

gistfile1.c

#include <stdio.h>

int (*fn[2])(int);
int fib(int n) { return (*fn[n < 2])(n); }

int fibSeed(int n)  { return 1; }
int fibRecur(int n) { return fib(n - 1) + fib(n - 2); }

void fibInit(void) {
  fn[0] = fibRecur;
  fn[1] = fibSeed;
}

int main() {
  int i;
  fibInit();

  for (i = 0; i <= 25; ++i) {
    printf("%2d %6d\n", i, fib(i));
  };

  return 0;
}

Hooray for function pointers!