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]

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

#include

using namespace std;

int main()

{

string s1[]= {"How" , "to" };

s1[0].swap(s1[1]);

for (int i=0; i<2; i++) {

cout << s1[i];

}

return( 0 );

}

AIt prints: Hoto

BIt prints: toHow

CIt prints: Ht

DIt prints: to

Show Suggested Answer

Suggested Answer: B

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

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Jovita

7 months ago

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

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Starr

7 months ago

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

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Arthur

7 months ago

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

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Arthur

7 months ago

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

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Sheldon

7 months ago

Really? Why B?

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Starr

8 months ago

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

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