C++ Institute Exam CPP 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

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:

A1 2 3 4 5 6 10 8 7 9

B3 2 4 1 5 6 7 8 9 10

C3 2 4 1 5 6 10 8 7 9

D1 2 3 4 5 6 7 8 9 10

Ecompilation error

Show Suggested Answer Hide Answer

Suggested Answer: C

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

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Catarina
12 days 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
16 days 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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Stephaine
1 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
16 days 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
27 days ago

No, I believe it's B) 1 2 3 4 5 6 7 8 9 10

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Lili
29 days ago

I think it's A) 8 10 5 1 4 6 2 7 9 3

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Nada
2 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
2 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
27 days 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
30 days ago

I agree, the correct answer is B) 1 2 3 4 5 6 7 8 9 10.

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Yolando
2 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
2 months ago

I think the answer is B) 1 2 3 4 5 6 7 8 9 10.

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