计算斐波那契数列第n项的函数定义如下: int fib(int n) if (n

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问题:

计算斐波那契数列第n项的函数定义如下:
int fib(int n)
if (n==0)return 1;
else if(n==1) return 2;
else return fib(n=1)+fib(n=2);

若执行函数调用表达式fib(2),函数fib被调用的次数是( )。

A.1
B.2
C.3
D.4

考点:计算机等级考试C++二级C++笔试
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阅读理解。

                                                      Films in Beijing Theater This Week 

                                                             HARRY POTTER (Ⅲ)

American film

Director: Alfonso Cuaron

Starring: Daniel Radcliffe,

              Rupert Grint,

              Emma Watson

Time: From Monday to Wednesday, at 6:00 p. m.

Ticket Price: ¥20

                                                            KUNGFU HUSTLE 

Chinese film

Director: Zhou Xingchi

Starring: Zhou Xingchi,

              Liang Xiaolong, 

              Yuan Hua

Time: From Wednesday to Friday, at 9:00 p. m.

Ticket Price: ¥16

                                                         A WORLD WITHOUT THIEVES

Chinese film

Director: Feng Xiaogang

Starring: Liu Dehua,

             Liu Ruoying,

             Ge You,

             Li Bingbing

Time: From Friday to Sunday, at 6:30 p. m.

Ticket Price: ¥18 (Half on Sunday for children)

                                                                          TROY

American film

Director: Wolfgang Peterson

Starring: Julian Glover,

              Brian Cox, 

              Nathan Jones,

              Adoni Maropis

Time: From Tuesday to Saturday, at 9:30 a. m.

Ticket Price: ¥14

1. There will be ____ in Beijing Theater this week. [ ]

A. one Chinese film

B. two Chinese films

C. three American films

D. four foreign films

2. If an adult with his child goes to Beijing Theater to watch A world Without Thieves on Sunday, they

    will spend ____ on the film. [ ]

A. ¥30

B. ¥24

C. ¥27

D. ¥21

3. If you are free on Friday morning, you can see the film ____ in Beijing Theater. [ ]

A. HARRY POTTER (Ⅲ)

B. KUNGFU HUSTLE

C. A WORLD WITHOUT THIEVES

D. TROY

4. You can see three films on ____ or ____. [ ]

A. Wednesday; Friday

B. Tuesday; Wednesday

C. Thursday; Friday

D. Saturday; Sunday

5. From the poster (海报), we know ____ is both a director and actor. [ ]

A. Alfonso Cuaron

B. Feng Xiaogang

C. Wolfgang Peterson

D. Zhou Xingchi

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在Linux中,目录()主要用于存放设备文件。

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