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What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
class B { int val;
public:
B(int v):val(v){}
int getV() const {return val;} bool operator < (const B & v) const { return val ostream & operator <<(ostream & out, const B & v) { out< template ostream & out; Out(ostream & o): out(o){} void operator() (const T & val ) { out< int main() { B t1[]={3,2,4,1,5}; B t2[]={5,6,8,2,1}; vector v1(10,0); sort(t1, t1+5); sort(t2, t2+5); set_symmetric_difference(t2,t2+5,t1,t1+5,v1.begin()); for_each(v1.begin(), v1.end(), Out(cout));cout< return 0; } Program outputs:
Suggested Answer: E
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28 comments · newest first
JO
Jordan
10 months ago
Wait, why are there so many zeros in the output?
KA
Kallie
10 months ago
I think the output should be 6 8 0 0 0 0 0 0 0 0.
ST
Steffanie
10 months ago
The code compiles fine, no errors.
AL
Alethea
10 months ago
Definitely not a compilation error, so D is wrong.
DI
Dion
11 months ago
I disagree, the output is definitely not what option E suggests.
KR
Krystal
11 months ago
I'm leaning towards option C because it seems like the unique elements from t2 would be printed, but I'm not completely confident.
LA
Latanya
11 months ago
I practiced a similar question where sorting was involved, and I feel like the output might be related to the sorted values of t1 and t2.
LA
Lai
11 months ago
I remember something about `set_symmetric_difference`, but I can't recall if it will actually work with the way the vectors are set up.
KR
Kristel
11 months ago
I think the code should compile fine since all the necessary includes are there, but I'm not sure about the output.
DO
Douglass
12 months ago
This seems straightforward enough. I'll work through the logic and try to visualize the data structures to arrive at the correct output.
MA
Matthew
12 months ago
I'm a bit confused by the custom B class and the overloaded operators. I'll need to make sure I understand how those are being used in the code.
AR
Arminda
12 months ago
Okay, I think I've got this. The key is understanding how the sort and set_symmetric_difference functions are being used on the two arrays of B objects.
TA
Tawny
1 year ago
Hmm, the use of set_symmetric_difference is interesting. I'll need to review how that algorithm works to determine the expected output.
KA
Kathrine
1 year ago
This looks like a tricky one. I'll need to carefully go through the code step-by-step to understand what's happening.
SH
Shay
1 year ago
Whoa, they're playing around with all sorts of fancy C++ stuff here. I bet the output is gonna be a total surprise, like finding a unicorn in your cereal bowl.
DI
Dierdre
1 year ago
I'm not sure, but I think it might be option C) compilation error
DI
Dierdre
1 year ago
No way, I believe it will be option B) 1 2 3 4 5 6 7 8 9 10
DO
Dortha
1 year ago
C) compilation error
DO
Dortha
1 year ago
C) compilation error
DI
Dierdre
1 year ago
I think the output will be option A) 8 10 5 1 4 6 2 7 9 3
KR
Kristofer
1 year ago
Hmm, you might be right. Let's see what others think about this question.
JO
Joesph
1 year ago
I disagree, I believe the answer is B because set_symmetric_difference will give the symmetric difference between the two ranges.
KR
Kristofer
1 year ago
I think the answer is A because set_symmetric_difference will give the elements that are in one of the ranges but not in both.
BO
Bonita
1 year ago
Wait, did they just try to use a vector with a custom class? Sounds like a recipe for a good ol' fashioned compilation error to me.
DE
Denise
1 year ago
Oh man, this code looks like a real head-scratcher! I bet the compiler is gonna choke on it like a cat with a hairball.
RE
Ressie
1 year ago
Yeah, the code seems to be missing the necessary include for set_symmetric_difference.
RE
Ressie
1 year ago
I think the issue might be with the set_symmetric_difference function.
RE
Ressie
1 year ago
It will output: C) compilation error