1 char line[4] = { '1', '9', '9', '\0' };
2 
main()3 int main()
4 {
5   char *ptr = line + 3;
6 
7   while ((*--ptr += 1) > '9') *ptr = '0';
8   if (line[0] != '2' || line[1] != '0' || line[2] != '0')
9     abort();
10   return 0;
11 }
12