C++ Institute Exam CPP Topic 9 Question 90 Discussion

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

Question #: 90
Topic #: 9

[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() {

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

deque d1(t, t+10);

sort(d1.begin(), d1.end());

set s1(t,t+10);

cout<

return 0;

}

Program outputs:

A1 0

B1 1

Ctrue true

Dfalse false

Ecompilation error

Show Suggested Answer Hide Answer

Suggested Answer: E

by Rikki at Jul 13, 2024, 08:54 PM

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Naomi
2 days ago

I'm going to go with option B. It just makes the most sense to me. Although, if I'm being honest, I'm half-hoping for a compilation error, just to make things more interesting. That would really spice up my day!

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Jonell
5 days ago

This is a good one! I bet the `deque` search returns 0 because the elements aren't sorted in the same order as the `set`. Gotta love those tricky data structure questions!

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Major
7 days ago

Wait, is this a trick question? The `binary_search` function returns 1 for true and 0 for false, so the output should be 1 1, right? Unless there's some hidden gotcha here...

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Martin
9 days ago

Hmm, looks like the program is trying to use the `B` class in a `set` and a `deque`. I'm guessing the comparison operators are implemented correctly, so the output should be pretty straightforward.

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Vashti
17 days ago

I'm not sure, but I think the answer might be D because the first binary_search should return 0 since 4 is not in the set, but the second one should return 1 because 4 is in the deque.

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Raul
18 days ago

I agree with Jordan, the first binary_search should return 1 since 4 is in the set, but the second one should return 0 because 4 is not in the deque.

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Jordan
23 days ago

I think the answer is A because binary_search returns 1 if the element is found in the set, and 0 if not.

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