C++ Institute Exam CPP Topic 1 Question 93 Discussion

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

Question #: 93
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 Blondell at Sep 11, 2024, 07:31 PM

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Carin

5 months ago

Wait, is this a trick question? The real answer is to scrap the whole thing and use Python instead. Much less headache.

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Bettina

5 months ago

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

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Magda

5 months ago

Hmm, let's see... Is the answer 42? Because that's the answer to everything, right?

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Jonell

5 months ago

C looks right to me. I mean, what could go wrong with that convoluted `Sequence` struct? It's probably just an elegant and concise way to generate the numbers.

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Barbra

5 months ago

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

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Nina

5 months ago

B) 20 30 20 30 20 30 20

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Ronnie

5 months ago

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

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Dominic

6 months ago

I'm going with A. Who doesn't love a good old-fashioned off-by-one error? Classic!

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Rosendo

6 months ago

D, definitely a compilation error! Why would they use `remove()` on a vector when they should be using `erase()`? Rookie mistake.

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Mila

4 months ago

D) compilation error

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Christoper

4 months ago

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

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Lashunda

4 months ago

B) 20 30 20 30 20 30 20

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Theola

5 months ago

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

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Carolynn

6 months ago

The correct answer is B. The code generates a sequence of 10 numbers starting from 1 and incrementing by 3, then removes the value 10 from the vector before printing the remaining numbers.

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