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C++ Institute CPP Exam - Topic 5 Question 95 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 95
Topic #: 5
[All CPP Questions]

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

#include

#include

#include

using namespace std;

class B { int val;

public:

B(int v):val(v){}

int getV() const {return val;} bool operator < (const B & v) const { return val

ostream & operator <<(ostream & out, const B & v) { out<

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

int main() {

B t1[]={3,2,4,1,5};

B t2[]={6,10,8,7,9};

vector v1(10);

sort(t1, t1+5);

sort(t2, t2+5);

merge(t1,t1+5,t2,t2+5,v1.begin());

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

return 0;

}

Program outputs:

Show Suggested Answer Hide Answer
Suggested Answer: C

by Shawna at Sep 18, 2024, 07:34 PM

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Huey
3 months ago
Nah, I think it just prints the original arrays, not sorted.
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Harris
3 months ago
I thought the merge function needed a different setup.
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Paris
4 months ago
Wait, are we sure it doesn't throw any errors?
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Leonida
4 months ago
Definitely outputs sorted values, so option D is correct!
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Raina
4 months ago
The code sorts and merges two arrays of class B.
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Nickolas
4 months ago
I thought the merge function would combine the two sorted arrays, but I'm confused about how the vector v1 is being used. Is it initialized correctly?
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Jerrod
4 months ago
I practiced a similar question, and I feel like the arrays t1 and t2 are not initialized correctly for merge. Could it lead to a compilation error?
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Tamekia
5 months ago
I think the output should be sorted, so maybe option D is correct? But I can't recall if the merge function needs sorted input.
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Mauricio
5 months ago
I remember something about sorting and merging, but I'm not sure if the merge function will work with the way the arrays are defined.
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Von
5 months ago
I'm not sure about this one. The output options seem a bit tricky, and I'm not confident I can predict the exact result. I'll need to carefully work through the code step-by-step.
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Tamra
5 months ago
Hmm, I think I've got a handle on this. The sorted arrays are being merged into the vector v1, so the output should be the combined sorted elements.
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Carissa
5 months ago
I'm a bit confused by the custom class B and the overloaded operators. I'll need to make sure I understand how those are being used in the sorting and merging.
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Alica
5 months ago
Okay, let's see. The code is sorting two arrays and then merging them into a vector. I think the key is to understand how the merge operation works.
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Rebbeca
5 months ago
This looks like a tricky one. I'll need to carefully step through the code to understand what's happening.
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Nicolette
5 months ago
Cloud Storage could work, but I'm not sure if that's the best approach for ongoing analytics. Might be better to go with a more purpose-built data storage solution.
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Catarina
9 months ago
Wait, did they forget to include the 'greater' comparison function for the B class? This is going to be a tough one! *grabs popcorn*
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Kendra
10 months ago
This is easy! The answer is A) 8 10 5 1 4 6 2 7 9 3. The merge operation interleaves the elements of the two arrays, which is exactly what the output shows.
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Crissy
8 months ago
User 2
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Alpha
8 months ago
User 1
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Veta
9 months ago
User 2
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Aileen
9 months ago
User 1
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Stephaine
11 months ago
I'm going with C) compilation error. The code has a missing header file for the vector class, so it won't compile.
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Elly
10 months ago
I'm going with C) compilation error. The code has a missing header file for the vector class, so it won't compile.
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Samuel
10 months ago
No, I believe it's B) 1 2 3 4 5 6 7 8 9 10
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Lili
10 months ago
I think it's A) 8 10 5 1 4 6 2 7 9 3
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Nada
11 months ago
I'm not sure, but I think the correct answer is B) 1 2 3 4 5 6 7 8 9 10 because of the sorting and merging operations in the code.
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Launa
11 months ago
Hmm, the code seems to be merging two sorted arrays into a vector. I think the correct answer is B) 1 2 3 4 5 6 7 8 9 10, as the merge operation should preserve the sorted order of the input arrays.
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Carma
10 months ago
Yes, the merge operation should maintain the sorted order, so the output should be B) 1 2 3 4 5 6 7 8 9 10.
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Carma
10 months ago
I agree, the correct answer is B) 1 2 3 4 5 6 7 8 9 10.
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Yolando
11 months ago
I agree with Milly, because the code sorts the arrays t1 and t2 and then merges them into vector v1 in ascending order.
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Milly
11 months ago
I think the answer is B) 1 2 3 4 5 6 7 8 9 10.
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