C++ Institute Exam CPA Topic 4 Question 86 Discussion

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

Question #: 86
Topic #: 4

[All CPA Questions]

Which code, inserted at line 15, generates the output "5 Bob"?

#include

using namespace std;

class B;

class A {

int age;

public:

A () { age=5; };

friend void Print(A &ob, B &so);

};

class B {

string name;

public:

B () { name="Bob"; };

//insert code here

};

void Print(A &ob, B &so) {

cout<

}

int main () {

A a;

B b;

Print(a,b);

return 0;

}

Afriend void Print(A ob, B so);

Bfriend void Print(A &ob, B &so);

Cfriend void Print(A *ob, B *so);

DNone of these

Show Suggested Answer

Suggested Answer: B

by Maynard at Apr 30, 2024, 06:10 AM

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Jovita

10 months ago

Yeah, it's tricky. You need to know how swap works in std::string.

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Starr

10 months ago

Makes sense. But it's a bit confusing at first glance.

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Arthur

10 months ago

Because the swap function exchanges s1[0] and s1[1].

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Arthur

10 months ago

Yeah, I did. I think it prints: toHow. Option B.

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Sheldon

10 months ago

Really? Why B?

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Starr

12 months ago

Did you see Question 4? What happens when you run that C++ code?

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