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