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C++ Institute CPP Exam - Topic 4 Question 72 Discussion

What happens when you attempt to compile and run the following code? Choose all possible answers.#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;} };ostream & operator
A) program will display:5
B) program will not compile
C) program will compile
D) program will cause runtime exception

C++ Institute CPP Exam - Topic 4 Question 72 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 72
Topic #: 4
[All CPP Questions]

What happens when you attempt to compile and run the following code? Choose all possible answers.

#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;

} };

ostream & operator<<(ostream & c, const C & v) {

c<

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);

a.add(C());

cout << a.getV() <

return 0;

}

Show Suggested Answer Hide Answer
Suggested Answer: E

by Devora at Oct 08, 2023, 05:20 PM

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Buck
6 months ago
I agree, the operator overload might cause issues.
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Dorothy
7 months ago
Wait, are you sure it compiles? Seems off.
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Nan
7 months ago
Definitely outputs 5!
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Sherron
7 months ago
I think it won't compile due to the operator+=.
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Rosio
7 months ago
Looks like it will compile fine.
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Fidelia
8 months ago
I’m leaning towards option B, thinking the program might not compile due to the way the operator+= is defined.
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Irene
8 months ago
I feel like there might be an issue with the add function in class A. It uses a reference, which could cause problems.
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Kallie
8 months ago
I remember similar questions where the operator+= was tricky. I wonder if it will work correctly with the class C.
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Filiberto
8 months ago
I think the program should compile because the syntax looks fine, but I'm not sure about the operator overloads.
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Salome
8 months ago
I'm not entirely sure about this one. The code looks complex with the templates and operator overloading. I'll need to carefully consider the semantics of the different classes and functions to determine the correct answer.
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Iluminada
8 months ago
Okay, I think I've got a strategy here. The `A` object will have a `C` object as its `_v` member, and the `add` function will call the `operator+=` overload to update that `C` object. Let me work through the details.
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Kimi
8 months ago
Hmm, I think the program will compile, but I'm not sure what the output will be. I'll need to walk through the code step-by-step to figure out the behavior.
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Salena
8 months ago
I'm a bit confused by the `operator+=` overload for the `C` class. Does that mean the `add` function in the `A` class will work with `C` objects?
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Detra
8 months ago
This looks like a tricky C++ question. I'll need to carefully read through the code and think about the operator overloading and template usage.
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Brande
8 months ago
Okay, I've got this. Dynamic threat analysis (DTA) is the best description for how container images are dynamically analyzed before deployment.
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Louvenia
8 months ago
The number of concurrent users seems like it could be relevant, but I'm not sure how that would directly impact the Extract processes. I'll have to consider that further.
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Ira
8 months ago
Hmm, I'm a bit unsure about this one. I know lower interest rates usually encourage more spending, but I'm not sure if that's the "most likely" consequence. Let me think this through.
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Phillip
8 months ago
Honestly, I'm torn between A and C. I just hope I can remember what I practiced on this topic!
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Fausto
1 year ago
I'm going to go with option C - the program will compile. The code looks well-written, and the template class A seems to be handling the addition of the C objects correctly.
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Jesusa
12 months ago
Yes, it looks like the program will compile successfully.
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Elenore
12 months ago
I agree, the code seems to be structured properly for compilation.
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Amie
12 months ago
I think option C is correct. The program should compile without any issues.
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Lawana
1 year ago
Haha, this is an interesting one! I bet the output will be something like '5', but I'm curious to see if there's any hidden surprises in the code that could cause a runtime exception.
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Roy
1 year ago
User4: There shouldn't be any runtime exceptions in this code.
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Floyd
1 year ago
User3: The program will compile without any issues.
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Eura
1 year ago
User2: I agree, it looks like the program will display '5'.
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Edwin
1 year ago
User1: I think the output will be '5'.
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Karan
1 year ago
This code looks a bit complex, but I think it will compile and run without any issues. The += operator overload for the C class seems to be working correctly.
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Mertie
1 year ago
The program will compile and run, but I'm not sure about the output. The default constructor for C adds 0 to the member variable _c, so I'm curious to see what the final value will be.
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Tarra
1 year ago
A) program will display:5
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Tarra
1 year ago
C) program will compile
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Tesha
1 year ago
I'm not sure. I think the program will cause a runtime exception because there might be an issue with the way the operator+= is implemented in class C.
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Ciara
1 year ago
I agree with Jeniffer. The program should compile and run without any issues since the operator+= is defined for class C.
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Jeniffer
1 year ago
I think the program will display:5 because the code seems to be adding a default constructed object of class C to the object a.
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