C++ Institute CPP Exam - Topic 8 Question 58 Discussion

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

Question #: 58
Topic #: 8

[All CPP Questions]

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

#include

using namespace std;

class C {

public:

int _c;

C():_c(0){}

C(int c) { _c = c;}

C operator+=(C & b) {

C tmp;

tmp._c = _c+b._c;

return tmp;

}

};

template

class A {

T_v;

public:

A() {}

A(T v): _v(v){}

T getV() { return _v; }

void add(T & a) { _v+=a; }

};

int main()

{

A b(2);

Aa (5);

Cc;

a.add(c);

cout << a.getV() <

return 0;

}

Aprogram will display:2

Bprogram will not compile

Cprogram will compile

Dprogram will cause runtime exception

Show Suggested Answer

Suggested Answer: B

by Ligia at Nov 20, 2022, 07:47 PM

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Patria

4 months ago

Definitely a runtime exception, I can feel it!

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Leota

4 months ago

I thought it would run fine, what's the issue?

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Coleen

4 months ago

Wait, why wouldn't it compile?

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Wynell

4 months ago

I agree, it won't compile.

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Danilo

4 months ago

Looks like a compilation error to me.

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Cassi

5 months ago

I practiced a similar question where a class was not properly defined, and it didn't compile. I wonder if this is the same case.

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Ryan

5 months ago

The `add` function takes a reference, but I feel like it might be missing a proper operator for `C`. Could that be why it fails?

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Mireya

5 months ago

I remember something about operator overloading, but I'm not sure if it applies here since `C` is being used in a template class.

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Daron

5 months ago

I think the code won't compile because of the way the `add` function is trying to use the `C` class.

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Erinn

5 months ago

Ah, I think I've got it! The key is checking the Allow Inline Editing for Inventory Items preference. That's likely the culprit here.

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Elina

5 months ago

Hmm, this looks like a tricky one. I'd probably start by adding a System.debug() statement before the insert method to see what's going on.

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