C++ Institute Exam CPP Topic 1 Question 103 Discussion

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

Question #: 103
Topic #: 1

[All CPP Questions]

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

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

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

T getV() { return _v; }

void add(T & a);

void add(string & a);

};

template

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

void A::add(string & a) {

_v.insert(0, a);

}

int main()

{

Aa("Hello");

string s(" world!");

a.add(s);

cout << a.getV() <

return 0;

}

Aprogram will display: Hello world!

Bcompilation error

Cprogram will display: world!Hello

Dprogram will run without any output

Show Suggested Answer

Suggested Answer: B

by Doug at Jan 22, 2025, 04:52 PM

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Vilma

28 days ago

I believe the program will display: Hello world! because the string 'world!' will be inserted at the beginning of 'Hello'.

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Tijuana

1 months ago

I'm not sure, but I think there might be a compilation error.

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Merissa

1 months ago

Ha! I bet the output will be 'world!Hello'. The add() function for the string type inserts the input string at the beginning of the existing string. Tricky, but I got it!

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Emiko

1 days ago

So the program will display: world!Hello

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Sharita

6 days ago

Yes, you're right! The string input gets inserted at the beginning.

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Adell

14 days ago

I think the output will be 'world!Hello'.

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Michal

1 months ago

I agree with Mirta, the code looks correct to me.

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Mirta

1 months ago

I think the program will display: Hello world!

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Alva

1 months ago

Hmm, I'm not sure. Maybe it's a compilation error because the template class A doesn't have a default constructor? Let me think about this a bit more.

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King

1 months ago

No, it will actually result in a compilation error.

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Ligia

1 months ago

It will display: Hello world!

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Amos

2 months ago

This is easy, the program will display 'Hello world!' as per option A. The add() function for the string type appends the input string to the existing string.

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Jeanice

1 months ago

Great, so the output will be 'Hello world!'

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Linsey

2 months ago

Yes, you are correct. The add() function for the string type appends the input string to the existing string.

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Sommer

2 months ago

I think the program will display 'Hello world!' as per option A.

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