#include <stdio.h>

int main() {
	auto int a = 0;
	int b = 20;
	int c = 1;
	int d = 0;

	// See: https://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Nested-Functions.html
	inline auto void lf(register int *r) {
		a += *r;
		int s = a + *r;
		inline void deepfun() {
			s *= 2;
		}

		deepfun();
		d += s;
	}; // semicolon(;) not needeed!

	/*
	// Same as above... but need auto storage class if you pre-declare
	inline auto void lf(register int* r);
	// ...
	inline void lf(register int* r) {
		a += *r;
	}; // semicolon(;) not needeed!
	*/

	lf(&b);
	lf(&c);

	printf("%d .. %d\n", a, d);
}