replay_answer
struct replay_answer* a, *na;
struct replay_answer* ans = (struct replay_answer*)calloc(1,
sizeof(struct replay_answer));
delete_replay_answer(struct replay_answer* a)
struct replay_answer* ans = runtime->answer_list,
struct replay_answer;
struct replay_answer* answer_list;
struct replay_answer* answer_last;
struct replay_answer* next;