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C++ Institute CPP Exam - Topic 3 Question 64 Discussion

Which method added to class B at the marked spot will allow the code below to compile? Chooseall possible solutions.#include #include #include using namespace std;class B { int val;public:B(int v):val(v){}int getV() const {return val;}/* Insert Code Here */};ostream & operator
B) bool operator > (const B & v) const { return val<v.val;}
A) bool operator < (const B & v) const { return val<v.val;}
C) bool operator > (const B & v) const { return val>v.val;}
D) bool operator == (const B & v) const { return val==v.val;}
E) operator int () const { return val; }

C++ Institute CPP Exam - Topic 3 Question 64 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 64
Topic #: 3
[All CPP Questions]

Which method added to class B at the marked spot will allow the code below to compile? Choose

all possible solutions.

#include

#include

#include

using namespace std;

class B { int val;

public:

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

int getV() const {return val;}

/* Insert Code Here */

};

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() {

int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};

vector v1(t, t+10);

sort(v1.begin(), v1.end(), greater());

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

return 0;

}

Show Suggested Answer Hide Answer
Suggested Answer: B

by Antione at Mar 23, 2023, 11:52 PM

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Daisy
10 months ago
Totally agree, C is the only one that fits!
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Stephaine
10 months ago
Wait, does E even make sense in this context?
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Kip
10 months ago
D won't work for sorting, just equality check.
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Joanne
10 months ago
I think C is the right choice here.
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Esteban
11 months ago
A needs to return a bool for comparison!
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Rupert
11 months ago
I feel like the equality operator isn't really useful for sorting, so I think options A, C, and E are the most likely candidates.
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Joaquin
11 months ago
I’m a bit confused about the sorting function. Wouldn't we need both < and > operators to sort correctly?
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Colette
11 months ago
I think we practiced a question where we had to implement comparison operators. I feel like option C could work since it defines greater-than.
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Michel
11 months ago
I remember we discussed operator overloading in class, but I'm not sure if we need a less-than operator for sorting.
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Wayne
11 months ago
Hmm, this is a tricky one. I'll need to carefully read through each option and think about which ones accurately describe the features.
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Sarina
11 months ago
I'm a bit unsure on this one. The options all seem relevant, but I'm leaning towards the tool capabilities that allow setup and teardown of the test suites and SUT. That flexibility could be key for dealing with the unreliable environment.
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Rolande
11 months ago
I remember practicing with a question like this, and I think W3C was mentioned as an option. Could it be the correct one?
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Melissia
11 months ago
I'm not entirely sure I get the reasoning behind this. I'll need to think it through step-by-step to make sure I have the right understanding before responding.
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Dusti
1 year ago
I'm with Corinne and Roselle on this one. Option C is the obvious choice, unless you want your code to compile but sort your vector in the wrong order.
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Roosevelt
1 year ago
Come on, folks, this is a no-brainer. Option C is the way to go. How else would you expect the sort function to work with your custom class?
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Annmarie
1 year ago
Hmm, I'm not sure about that. Maybe we should also consider option E, as that could potentially work by allowing the class B to be implicitly converted to an integer for the sort function.
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Myrtie
1 year ago
Let's go with both options A and E to cover all possibilities.
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Gladys
1 year ago
Option A makes sense too, it defines the comparison needed for sorting.
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Melina
1 year ago
But what about option A? It defines the less than operator.
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Louisa
1 year ago
I think option E could work, it allows implicit conversion to int.
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Roselle
1 year ago
I agree with Corinne. Option C is the way to go, as it will provide the necessary comparison function for the sort operation.
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Omega
1 year ago
User 2
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Teri
1 year ago
User 1
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Corinne
1 year ago
Option C seems like the correct answer. We need to define a greater-than operator for the class B to allow the sort function to work as expected.
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William
1 year ago
Yes, that will allow the sort function to work properly.
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Tess
1 year ago
I agree, we need to define a greater-than operator for the class B.
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Annamae
1 year ago
I think option C is the right choice.
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Kerry
1 year ago
I see your point, but I still think A is the best choice because it compares the values correctly.
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Carey
1 year ago
I disagree, I believe the correct answer is C.
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Kerry
1 year ago
I think the answer is A.
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