scc

 1#define ARGS(...) __VA_ARGS__
 2
 3int
 4none()
 5{
 6	return 0;
 7}
 8
 9int
10one(int a)
11{
12	if (a != 1)
13		return 1;
14	
15	return 0;
16}
17
18int
19two(int a, int b)
20{
21	if (a != 1)
22		return 1;
23	if (b != 2)
24		return 1;
25	
26	return 0;
27}
28
29int
30three(int a, int b, int c)
31{
32	if (a != 1)
33		return 1;
34	if (b != 2)
35		return 1;
36	if (c != 3)
37		return 1;
38	
39	return 0;
40}
41
42int
43main()
44{
45	if (none(ARGS()))
46		return 1;
47	if (one(ARGS(1)))
48		return 2;
49	if (two(ARGS(1, 2)))
50		return 3;
51	if (three(ARGS(1, 2, 3)))
52		return 4;
53	return 0;
54}