scc

 1#define B "b"
 2
 3char s[] = "a" B "c";
 4
 5int
 6main()
 7{
 8	if (s[0] != 'a')
 9		return 1;
10	if (s[1] != 'b')
11		return 2;
12	if (s[2] != 'c')
13		return 3;
14	if (s[3] != '\0')
15		return 4;
16	return 0;
17}