New Year Sale 2026! Hurry Up, Grab the Special Discount - Save 25% - Ends In 00:00:00 Coupon code: SAVE25
Welcome to Pass4Success

- Free Preparation Discussions
Mail Us support@pass4success.com
Location US
Mob_nav_barsMENU

C++ Institute CPP Exam - 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

Limited Time Offer

25%

Off

Get Premium CPP Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

0/2000 characters
Submit Cancel
Lourdes
3 months ago
Sounds fishy, I doubt it runs forever.
upvoted 0 times
...
Verona
3 months ago
I think it might just output "1 2 3".
upvoted 0 times
...
Terry
3 months ago
Wait, why would it output "3" again?
upvoted 0 times
...
Frederica
4 months ago
Totally agree, the loop keeps reading until it fails.
upvoted 0 times
...
Margret
4 months ago
It will output "1 2 3 3".
upvoted 0 times
...
Benton
4 months ago
I don't recall seeing any compilation errors, so I doubt it's option D. But I'm confused about the loop condition.
upvoted 0 times
...
Edna
4 months ago
I practiced a similar question, and I feel like it might output "1 2 3 3" if it reads the last integer again somehow.
upvoted 0 times
...
Rex
4 months ago
I'm not entirely sure, but I remember something about the `good()` function. Could it cause an infinite loop?
upvoted 0 times
...
Gary
5 months ago
I think the code should output "1 2 3" since it reads the integers from the file correctly.
upvoted 0 times
...
Lyla
5 months ago
Hmm, I'm not sure about this one. The code looks a bit complex, and I'm worried there might be some edge cases I'm missing. I'll need to really think it through carefully.
upvoted 0 times
...
Pearly
5 months ago
I think I've got it! The key is that the file reading loop continues until the `good()` function returns false, which happens when we reach the end of the file. So the output should be exactly what's in the file.
upvoted 0 times
...
Thurman
5 months ago
Wait, I'm a bit confused. Why are we using a template class for the output? Isn't that overkill for this simple task? I'll need to double-check the details.
upvoted 0 times
...
Diane
5 months ago
Okay, let me think this through step-by-step. We're reading in a file, storing the numbers in a list, and then printing them out. I'm pretty confident I can figure this out.
upvoted 0 times
...
Burma
5 months ago
Hmm, this looks like a tricky one. I'll need to carefully read through the code and the question to make sure I understand what's going on.
upvoted 0 times
...
Dorethea
9 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!
upvoted 0 times
...
Amie
9 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.
upvoted 0 times
...
Tashia
9 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!
upvoted 0 times
Floyd
8 months ago
I think it might be D) compilation error
upvoted 0 times
...
Serita
9 months ago
I believe it will be C) no output
upvoted 0 times
...
Jerry
9 months ago
I'm going with B) 1 2 3 3
upvoted 0 times
...
Vallie
9 months ago
I think it will output A) 1 2 3
upvoted 0 times
...
...
Hannah
10 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!
upvoted 0 times
Fredric
8 months ago
I would go with option A as well, the code seems to be correct.
upvoted 0 times
...
Barb
8 months ago
Yes, the code looks fine, so option A is the most likely result.
upvoted 0 times
...
Hollis
9 months ago
I agree, option A is the correct output.
upvoted 0 times
...
...
Ashlyn
10 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.
upvoted 0 times
Ressie
9 months ago
A) 1 2 3
upvoted 0 times
...
...
Tiera
11 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.
upvoted 0 times
...
Devorah
11 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.
upvoted 0 times
...
Valentine
11 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.
upvoted 0 times
...

Save Cancel