C++ Institute Exam CPP 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) {

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;

}

Aprogram will display:5

Bprogram will not compile

Cprogram will compile

Dprogram will cause runtime exception

Show Suggested Answer

Suggested Answer: E

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

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Fausto

1 months 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

1 days ago

Yes, it looks like the program will compile successfully.

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Elenore

4 days ago

I agree, the code seems to be structured properly for compilation.

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Amie

7 days ago

I think option C is correct. The program should compile without any issues.

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Lawana

2 months 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

23 days ago

User4: There shouldn't be any runtime exceptions in this code.

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Floyd

1 months ago

User3: The program will compile without any issues.

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Eura

1 months ago

User2: I agree, it looks like the program will display '5'.

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Edwin

1 months ago

User1: I think the output will be '5'.

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Karan

2 months 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

2 months 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 months ago

A) program will display:5

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Tarra

2 months ago

C) program will compile

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Tesha

2 months 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

2 months 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

3 months 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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