scc

 1int
 2zero()
 3{
 4	return 0;
 5}
 6
 7int
 8one()
 9{
10	return 1;
11}
12
13int
14main()
15{
16	int x;
17	int y;
18	
19	x = zero();
20	y = ++x;
21	if (x != 1)
22		return 1;
23	if (y != 1)
24		return 2;
25	
26	x = one();	
27	y = --x;
28	if (x != 0)
29		return 3;
30	if (y != 0)
31		return 4;
32	
33	x = zero();
34	y = x++;
35	if (x != 1)
36		return 5;
37	if (y != 0)
38		return 6;
39	
40	x = one();
41	y = x--;
42	if (x != 0)
43		return 7;
44	if (y != 1)
45		return 8;
46	
47	return 0;
48}