She returned home from the office , only ()the door open and something() .A. finding ; missedB. to find; missedC. to find ; missingD. finding ; losing
She returned home from the office , only ()the door open and something() .
A. finding ; missed
B. to find; missed
C. to find ; missing
D. finding ; losing
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阅读以下说明和C++代码。【说明】传输门是传输系统中的重要装置。传输门具有Open(打开)、Closed(关闭)、Opening (正在打开)、StayOpen(保持打开)和Closing(正在关闭)五种状态。触发传输门状态转换的事件有click、complete和timeout三种。事件与其相应的状态转换如下图所示。下面的C++代码1与C++代码2分别用两种不同的设计思路对传输门进行状态模拟,请填补代码中的空缺。【C++代码1】const int CLOSED=1; const int PENING=2;const int PEN=3; const int CLOSING=4;const int STAYOPEN=5; //定义状态变量,用不同整数表示不同状态class Door {Private:int state; //传输门当前状态void setState(int state){ this->state=state;} //设置当前状态public:Door():state(CLOSED){};void getState(){ //根据当前状态输出相应的字符串switch(state){case OPENING: cout<<"OPENING"<<endl; break;case CLOSED: cout<<"CLOSED"<<endl; break;case OPEN: cout<<"OPEN"<<endl; break;case CLOSING: cout<<"CLOSING"<<endl; break;case STAYOPEN:cout<<"STAYOPEN"<<endl; break;}};void click() { //发生click事件时进行状态转换if ((1)) setState(OPENING);else if ((2)) setState(CLOSING);else if ((3)) setState(STAYOPEN);}void timeout(){ //发生timeout事件时进行状态转换if (state == OPEN) setState(CLOSING);}void complete(){ //发生complete事件时进行状态转换if (state == OPENING) setState(OPEN);else if (state == CLOSING) setState(CLOSED);}};int main(){Door aDoor;aDoor.getState();aDoor.click(); aDoor.getState();aDoor.complete();aDoor.getState(); aDoor.click();aDoor.getState();aDoor.click(); aDoor.getState(); return 0;}【C++代码2】class Door {public:DoorState *CLOSED,*OPENING,*OPEN,*CLOSING,*STAYOPEN,*state;Door();virtual~Door(){……//释放申请的内存,此处代码省略);void setState(DoorState *state) { this->state = state;}void getState(){//此处代码省略,本方法输出状态字符串,//例如,当前状态为CLOSED时,输出字符串为“CLOSED”};void click();void timeout();void complete();};Door::Door(){CLOSED = new DoorClosed(this); OPENING = new DoorOpening(this);PEN = new DoorOpen(this); CLOSING = new DoorClosing(this);STAYOPEN = new DoorStayOpen(this);state = CLOSED;}void Door :: click() {(4);)void Door :: timeout() {(5);)void Door :: complete() {(6);}class DoorState//定义一个抽象的状态,它是所有状态类的基类{protected:Door *door;public:DoorState(Door *door) {this->door = door;}virtual~DoorState(void);virtual void click() {}virtual void complete(
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