阅读以下说明和C++代码，填充代码中空缺，将解答填入答题纸对应栏内。
[说明]
某应急交通控制系统(TraficControlSystem)在红灯时控制各类车辆(Vehicle)通行，其类图如下图所示，在紧急状态下应急车辆红灯时也可通行，其余车辆按正常规则通行。
下面C++代码实现以上设计，请完善其中空缺。
[C++代码]#include＜typeinfo＞#include＜iostream＞using namespace std;class Vehicle {/*抽象基类,车辆*/public:virtual void run()=0;};class Emergency { /*抽象基类,可在红灯时通行接口,函数均为纯虚函数*/public:______=0; //isEmergent()函数接口______=0; //runRedLight()函数接口};clasS Car:public Vehicle{public:～Car(){}void run(){/*代码略*/ ));class Truck:public Vehicle{public:～Truck(){}void run(){ /*代码略*/ });class PoliceCar:______ {private:bool isEmergency;public:PoliceCar():Car(),Emergency() { this-＞isEmergency=false;}PoliceCar(bool b):Car(),Emergency() {this-＞isEmergency=b;}～P0liceCar(){ }bool isEmergent(){ return ______}void runRedLight() { /*代码略*/ });/*类Ambulance、FireEngine实现代码略*/class TraficControlsystem { /*交通控制类*/private:Vehicle*v[24]; int numVehicles;/*在构造函数中设置初始值为0*/public:void control(){ //控制在紧急情况下应急车辆红灯通行,其他情况按常规通行for(int i=0;i＜numVehicles; i++){Emergency *ev=dynamic_cast＜Emergency*＞(v[i]);if(ev !=0) ______-＞runRedLight();else ______-＞run();}}void add(Vehicle*vehicle) { v[numVehicles++] =vehicle; }/*添加车辆*/void shutDown() {for(int i=0; i＜numVehicles; i++) { delete v[i];} }};int main(){TraficControlSystem*tcs=new TraficControlSystem;tcs-＞add(new Car()); tcs-＞add(new PoliceCar());tcs-＞add(new Ambulance()); tcs-＞add(new Ambulance(true));tcs-＞add(new FireEngine(true));tcs-＞add(new FireEngine());tcs-＞add(new Truck());tcs-＞contr01();tcs-＞ShutDown();delete tcs;}
virtual bool isEmergent()
virtual void nmRedLight()
public Car, public Emergency
this-＞isEmergency
ev
v[i]
