C++ Institute CPP Exam - Topic 9 Question 49 Discussion

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

Question #: 49
Topic #: 9

[All CPP Questions]

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

#include

using namespace std;

int main()

{

cout.setf(ios::oct, ios::basefield);

cout<<100<<" ";

cout.setf(ios::showbase);

cout<<100<<" ";

return 0;

}

Program outputs:

A144 0144

B144 0x64

C0x144 0144

D0144 100

Ecompilation error

Show Suggested Answer

Suggested Answer: A

by Haydee at May 31, 2022, 04:14 AM

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Luke

7 months ago

I disagree, it should be 0x64 for the second one.

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Mose

7 months ago

Wait, why is it 144 and not 100?

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Dalene

7 months ago

I think it should show the base for the second output.

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Sheridan

7 months ago

Definitely not a compilation error!

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Gabriele

8 months ago

Outputs 144 0144

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Roslyn

8 months ago

I feel like there might be a compilation error because of the way the `setf` function is used, but I can't quite remember if that's correct.

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Olive

8 months ago

I practiced a similar question where we had to set different formats, and I think the output should be 144 for the first one and something with a prefix for the second.

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Mabel

8 months ago

I remember something about showing the base with `ios::showbase`, but I can't recall if it applies to the first output or the second one.

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Casey

8 months ago

I think the first output should be in octal since we set it to octal format, but I'm not sure what the actual value will be.

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Ozell

8 months ago

Okay, I've got this. Documentary evidence is definitely required, so I'm going with option A. Can't go wrong with the basics.

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