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C++ Institute Exam CPP Topic 2 Question 102 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 102
Topic #: 2
[All CPP Questions]

What will happen when you attempt to compile and run the code below, assuming that file test.in contains the following sequence: 1 2 3?

#include

#include

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) {out<

int main () {

ifstream f("test.in");

list l;

for( ; f.good() ; ) {

int i;

f>>i;

l.push_back(i);

}

f.close();

for_each(l.begin(), l.end(), Out(cout));

return 0;

}

Program will output:

Show Suggested Answer Hide Answer
Suggested Answer: C

by Rosenda at Jan 13, 2025, 07:08 PM

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Dorethea
3 months ago
This question is making my head spin! I feel like I'm being tested on my ability to read minds, not C++ code. Maybe the real answer is that the program will summon a horde of angry cats who will steal all the test papers. Now that would be a real surprise!
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Amie
3 months ago
Hmm, I'm not too sure about this one. The code looks a bit complex, and I can see a couple of potential issues. I'm going to play it safe and go with D, just in case there's a compilation error lurking somewhere.
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Tashia
3 months ago
I'm going with B. The code looks a bit weird, and I think it might read the last integer '3' twice. You never know with these tricky questions!
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Floyd
2 months ago
I think it might be D) compilation error
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Serita
2 months ago
I believe it will be C) no output
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Jerry
2 months ago
I'm going with B) 1 2 3 3
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Vallie
2 months ago
I think it will output A) 1 2 3
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Hannah
3 months ago
Definitely option A. The code is straightforward and should work as expected. I'm surprised the other options are even there. This is an easy one!
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Fredric
2 months ago
I would go with option A as well, the code seems to be correct.
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Barb
2 months ago
Yes, the code looks fine, so option A is the most likely result.
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Hollis
2 months ago
I agree, option A is the correct output.
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Ashlyn
3 months ago
The program will output '1 2 3', as the code reads the integers from the input file and stores them in a list, then uses the for_each algorithm to print each element of the list to the console.
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Ressie
2 months ago
A) 1 2 3
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Tiera
4 months ago
I'm not sure, but I think the program will output B) 1 2 3 3 because the last integer will be printed twice.
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Devorah
5 months ago
I agree with Valentine. The program will output A) 1 2 3 because the for_each function will print the integers in the list.
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Valentine
5 months ago
I think the program will output A) 1 2 3 because it reads the integers from the file and pushes them into the list.
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