scc

 1/* taken from ISO/IEC 9899:1999 Section 6.10.3.5 p7 */
 2
 3#define t(x,y,z) x ## y ## z
 4
 5int j[] = { t(1,2,3), t(,4,5), t(6,,7), t(8,9,),
 6     t(10,,), t(,11,), t(,,12), t(,,) };
 7
 8int
 9main()
10{
11	if (j[0] != 123)
12		return 1;
13	if (j[1] != 45)
14		return 2;
15	if (j[2] != 67)
16		return 3;
17	if (j[3] != 89)
18		return 4;
19	if (j[4] != 10)
20		return 5;
21	if (j[5] != 11)
22		return 6;
23	if (j[6] != 12)
24		return 7;
25	return 0;
26}