scc

 1#define STR(x) #x
 2#define RES "This is a string!"
 3
 4int
 5main()
 6{
 7	char str1[] = STR(This is a string!);
 8	char str2[] = RES;
 9	int i;
10
11	for (i = 0; str1[i]; i++) {
12		if (str1[i] != str2[i])
13			break;
14	}
15
16	return str1[i] - str2[i];
17}