function/variable screening in c

gistfile1.c

#include <stdio.h>

typedef void (*ft) (const char *);
ft f;

void print1(const char *a) {
	printf("#1 -> %s\n", a);
}

void print2(const char *a) {
	printf("#2 -> %s\n", a);
}

int main()
{
	char a[] = "aaaa";
	ft f = print1;
	f(a);
	{
		f(a);
		char a[] = "bbbb";
		f(a);
		ft f = print2;
		f(a);
	}
	f(a);
}