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C++ Institute CPP Exam - Topic 8 Question 94 Discussion

Posted by Lacey on Sep 18, 2024 at 07:12 AM

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

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

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

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

int main() {

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

int 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:

Suggested Answer: D

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36 comments · newest first
CA
Carman 11 months ago
Nope, it's D for sure!
SH
Sharmaine 11 months ago
I think it should be E, there's a compilation error.
DO
Dominque 11 months ago
Wait, why does it say 10 before 8? That seems off.
EL
Elbert 11 months ago
Definitely outputs D, it's sorted!
CA
Carin 11 months ago
The code sorts and merges two arrays.
DE
Dell 12 months ago
I have a feeling there might be a compilation error because of the way the merge function is used.
JE
Jennifer 12 months ago
I practiced a similar question, and I believe the output should be sorted, so maybe option D is correct?
SH
Shawnda 12 months ago
I'm not entirely sure, but I remember something about the merge function needing the output vector to be large enough.
PA
Paulina 1 year ago
I think the code should compile fine since all the included libraries are correct.
DU
Dusti 1 year ago
Hmm, I'm not sure about this one. There are a lot of moving parts with the arrays, vector, and custom struct. I'll need to walk through it carefully step-by-step to make sure I understand what's happening.
MY
My 1 year ago
I'm feeling pretty confident about this one. The merge function should combine the two sorted arrays into the vector in the correct order. I'll double-check the syntax, but I think the answer is C.
HE
Hester 1 year ago
I'm a bit confused by the custom Out struct. Does that have something to do with the output? I'll need to research that a bit more.
WI
Winfred 1 year ago
This looks like a tricky one! I'll need to carefully step through the code to understand what's happening.
BA
Bambi 1 year ago
Okay, let's see... The code is sorting two arrays, then merging them into a vector. I think the key is understanding how the merge function works.
LE
Leonor 1 year ago
This question is similar to one we practiced, and I feel like the failover system mechanism was mentioned in that context.
AL
Albina 1 year ago
Wait, what? Reverse order? Did the code accidentally summon a black hole that's sucking in the numbers? C is my choice, but I might need to consult a physicist before submitting.
BE
Beth 1 year ago
Compile error? Really? This code looks pretty straightforward. Clearly, the compiler must be on vacation today. E is just a wild guess.
OC
Ocie 1 year ago
I'm not sure about this one. The merge seems right, but the output looks a bit off. Maybe I should double-check the algorithm. D seems plausible, but I'm not confident.
DY
Dylan 1 year ago
↳ replying to Ocie
User2: Maybe we should run the code to see the actual output
NI
Nickolas 1 year ago
↳ replying to Ocie
User3: I agree with User1, A) seems more likely based on the code
MI
Micaela 1 year ago
↳ replying to Ocie
User2: I'm not so sure, I feel like it might be B) 2 3 4 5 6 7 8 9 10 11
LA
Lashanda 1 year ago
↳ replying to Ocie
User1: I think the output will be A) 1 2 3 4 5 6 7 8 9 10
AN
Andra 1 year ago
Ha! Looks like someone's trying to trick us. The merge is done correctly, but the output is in reverse order. C is the way to go.
IN
India 1 year ago
↳ replying to Andra
Definitely C, the output is 10 9 8 7 6 5 4 3 2 1.
IN
India 1 year ago
↳ replying to Andra
Yeah, the merge is done correctly but the output is reversed.
IN
India 1 year ago
↳ replying to Andra
I think C is the correct answer.
GA
Gabriele 1 year ago
Hmm, I think the merge function is working correctly, but the array indices might be off. Let me double-check the logic. Maybe B is the right answer?
RO
Rodrigo 1 year ago
↳ replying to Gabriele
User 3
AL
Alva 1 year ago
↳ replying to Gabriele
User 2
CA
Candra 1 year ago
↳ replying to Gabriele
User 1
TA
Tanja 1 year ago
The code seems to be merging two sorted arrays into a vector. The output should be the merged and sorted elements, so I'll go with A.
DO
Dottie 1 year ago
↳ replying to Tanja
Looks like the code is merging and sorting the arrays correctly.
DO
Dottie 1 year ago
↳ replying to Tanja
A) 1 2 3 4 5 6 7 8 9 10
GA
Galen 2 years ago
I'm not sure, but I think the answer might be E) compilation error because the code is missing the include for the merge function. Without it, the code won't compile.
QU
Quentin 2 years ago
I agree with Valene. The code uses the sort function to sort the arrays and then merges them using the merge function. The output should be in ascending order.
VA
Valene 2 years ago
I think the answer is A) 1 2 3 4 5 6 7 8 9 10 because the code sorts the arrays t1 and t2 and then merges them into vector v1 in ascending order.
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