C++ Institute Exam CPP Topic 1 Question 85 Discussion

Actual exam question for C++ Institute's CPP exam

Question #: 85
Topic #: 1

[All CPP Questions]

What happens when you attempt to compile and run the following code?

#include

using namespace std;

void print(int v) { cout<

struct Sequence {

int start;

Sequence(int start):start(start){}

int operator()() {

return 10*(1+(start++ %3));

}

};

int main() {

vector v1(10);

generate_n(v1.begin(), 10, Sequence(1));

remove(v1.begin(), v1.end(), 10);

for_each(v1.begin(), v1.end(), print);cout<

return 0;

}

Program outputs:

A20 30 10 20 30 10 20 30 10 20

B20 30 20 30 20 30 20

C20 30 20 30 20 30 20 30 10 20

Dcompilation error

Show Suggested Answer

Suggested Answer: C

by Vallie at May 19, 2024, 06:58 AM

Limited Time Offer

25%

Off

Get Premium CPP Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Ming

8 months ago

Hmm, I'm going with option A. The `generate_n` function creates the sequence, and the `remove` function doesn't remove the last set of 10s, so the output should be the full sequence.

upvoted 0 times

...

Emiko

8 months ago

LOL, I bet the answer is D. The code has a bunch of includes and `using namespace std;`, so it's probably a compilation error. What a classic trap question!

upvoted 0 times

...

Virgie

8 months ago

I think option C is correct. The `generate_n` function fills the vector with the sequence of 20, 30, 10, and the `remove` function removes the 10s, leaving the final output.

upvoted 0 times

Helga

7 months ago

No, the correct answer is A) 20 30 10 20 30 10 20 30 10 20

upvoted 0 times

...

Marion

8 months ago

C) 20 30 20 30 20 30 20 30 10 20

upvoted 0 times

...

Helga

8 months ago

C) 20 30 20 30 20 30 20 30 10 20

upvoted 0 times

...

Rutha

8 months ago

B) 20 30 20 30 20 30 20

upvoted 0 times

...

Renea

8 months ago

B) 20 30 20 30 20 30 20

upvoted 0 times

...

Tanja

8 months ago

A) 20 30 10 20 30 10 20 30 10 20

upvoted 0 times

...

Hyman

8 months ago

A) 20 30 10 20 30 10 20 30 10 20

upvoted 0 times

...

Hannah

9 months ago

The program should output option B, as the `remove` function only removes the elements with the value of 10, leaving the remaining elements in the vector.

upvoted 0 times