int my_printf(FILE* out, const char* s, size_t p, int(*func)(const char* s, size_t p, int i))
{
	for (int i = 0; i < p; ++i)
		putc(func(s,p,i), out);

	return 0;
}

//function is defined on i in[0,p)
//reverse(x)
int reverse(const char* s, size_t p, int x)
{
	return *(s + p - 1 - x);
}




int main()
{
	char s[] = "Hello, Embarcadero";
	printf("before: %s\n", s);
	size_t p = strlen(s);
	my_printf(stdout, s, p, (*reverse));
	printf("\n");
	return 0;
}