scc

 1int
 2main(void) {
 3	static struct {
 4		char *name;
 5		const int offhour;
 6	} tzones[] = {
 7		{ "CDT", -5 * 3600 },
 8		{ "CST", -6 * 3600 },
 9		{ "EDT", -4 * 3600 },
10		{ "EST", -5 * 3600 },
11		{ "MDT", -6 * 3600 },
12		{ "MST", -7 * 3600 },
13		{ "PDT", -7 * 3600 },
14		{ "PST", -8 * 3600 },
15	};
16
17	if (tzones[0].offhour != -18000)
18		return 1;
19	if (tzones[1].offhour != -21600)
20		return 2;
21	if (tzones[2].offhour != -14400)
22		return 3;
23	if (tzones[3].offhour != -18000)
24		return 4;
25	if (tzones[4].offhour != -21600)
26		return 5;
27	if (tzones[5].offhour != -25200)
28		return 6;
29	if (tzones[6].offhour != -25200)
30		return 7;
31	if (tzones[7].offhour != -28800)
32		return 8;
33
34	return 0;
35}