strut people{

????identity,

????.………………

}people_info

Int main(){

????Request_something(strut people_info){

????????????Switch(people_info.identity){

????????????????????Case ? normal:

????????????????????????????Sleep(7days);

????????????????????????????response(“404”);break;

????????????????????Case ?party_member:

????????????????????????????Sleep(7days);

????????????????????????????response(“403”);break;

????????????????????Case ?Civil_servants:

????????????????????????????response(“building request_info,7 days after will execute.....”);

????????????????????????????Sleep(7days);

????????????????????????????execute();break;

????????????????????Case ?official:

????????????????????????????execute();break;

????????????????????????}

????????????}

}