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C++ Institute CPP Exam - Topic 4 Question 47 Discussion

What will happen when you attempt to compile and run the following code?#include #include using namespace std;template class A {T_v;public:A() {}A(T v): _v(v){}T getV() { return _v; }void add(T & a) { _v+=a; }};int main(){Aa("Hello");string s(" world!");a.add(s);cout
A) program will display: Hello world!
B) program will not compile
C) program will display: Hello
D) program will run without any output

C++ Institute CPP Exam - Topic 4 Question 47 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 47
Topic #: 4
[All CPP Questions]

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

#include

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

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

T getV() { return _v; }

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

};

int main()

{

Aa("Hello");

string s(" world!");

a.add(s);

cout << a.getV() <

return 0;

}

Show Suggested Answer Hide Answer
Suggested Answer: A

by Rima at May 07, 2022, 08:12 AM

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My
10 months ago
Definitely a compilation error, can't use T_v like that.
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Jin
10 months ago
Wait, really? I thought it would work fine!
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Lai
10 months ago
I thought it would just run and show "Hello world!"
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Sharen
11 months ago
Totally agree, it should be T _v; instead of T_v;
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Carlee
11 months ago
The program won't compile due to a typo in the template.
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Tammi
11 months ago
Hmm, I'm not totally sure about this one. I know a micrometer and caliper are contact measurement tools, but I'm not 100% confident on the laser scanner. I'll have to think this through carefully.
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Nakita
11 months ago
I feel pretty confident that the answer is C. The question is specifically about participants in the context of Analysis and Review, so it's likely referring to the unique email addresses and names that come up in the search results.
upvoted 0 times
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Novella
11 months ago
I'm not completely sure, but I feel like I saw a question like this in practice where applying proven tech was emphasized.
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