cleared
checked
removed
repaired
第1题：
请认真阅读以下关于某传输系统的技术说明、状态转换图及C++代码，根据要求回答问题1和问题2。
【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)5种状态。触发状态的转换事件有click、complete和timeout 3种，事件与其相应的状态转换如图6-18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，请填补代码段中的空缺语句。
【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:
private:
int state; //传输门当前状态
void setState(int state) { this-＞state = stale; } //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 s
第2题：
Upon completion of fueling a gasoline driven vessel it is necessary to ______.
A.keep ports，doors，windows，and hatches closed
B.start engines immediately
C.ventilate before starting engine
D.None of the above
第3题：
第4题：
开关舱的工作通常是由船员来做。（）
第5题：
（） fire doors, windows, hatches, accesses and ventilators.
第6题：
How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?
A.With gooseneck vents
B.With warning signs
C.With flame screens
D.With pressure-vacuum relief valves
第7题：
It’s going to rain. Don’t forget （）the hatches.
第8题：
if there is no obstruction around the anchor before anchoring, what do you report?
第9题：
翻译：the opening and closing of vessel’s hatches is to be performed by ship’s crew at owner’s expenses.
第10题：
the tallying work
the lashing work
the clean work
the work of opening and closing hatches