MENU
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() { int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3}; set s1(t, t+10); sort(s1.begin(), s1.end()); for_each(s1.begin(), s1.end(), Out(cout));cout< return 0; } Program outputs:
Suggested Answer: C
Get Premium CPP Questions
as Interactive Web-Based Practice Test or PDF
Real Exam Format
Detailed Explanations
Instant Access
Get Your Practice Test
27 comments · newest first
ED
Edda
7 months ago
I feel like it should output sorted values, but the code won't compile first.
AL
Alita
7 months ago
Definitely a compilation error. Can't sort a set directly like that.
CA
Carma
8 months ago
Agreed, the array type doesn't match the set type.
BE
Bette
8 months ago
Nah, it won't work as expected, definitely a compilation issue.
TY
Tyisha
8 months ago
The output should be sorted values, right?
LA
Laurel
8 months ago
Wait, why would it compile? I’m confused.
MI
Michel
8 months ago
Totally agree, can't sort a set directly like that!
IS
Isreal
8 months ago
Looks like a compilation error to me.
LE
Lettie
9 months ago
Hmm, I'm not sure about this one. Maybe I should have paid more attention in that data structures class.
DE
Delfina
9 months ago
I'm pretty sure I got this one right. The set container will sort the elements automatically.
KI
Kirby
9 months ago
Wow, this code looks like it's straight out of a textbook. I wonder if the professor wrote it themselves.
HU
Hui
9 months ago
Haha, I bet the person who wrote this question is a real stickler for proper formatting!
RE
Reid
9 months ago
I’m leaning towards option C, but I’m not completely sure. The way the set is initialized seems off to me.
TI
Tiffiny
10 months ago
I feel like the output should be sorted, but I can't recall if the set itself maintains order or if we need to sort it after.
LE
Leonardo
10 months ago
I think it will give a compilation error. The set constructor needs a different type.
SA
Sabina
10 months ago
The correct answer is B. The set container will sort the elements in ascending order.
LA
Latosha
11 months ago
I remember something similar where we had to sort a set, but I’m not sure if you can sort a set directly like that.
EL
Elvera
11 months ago
I think there might be a compilation error because the set constructor takes a range, but the array isn't a compatible type for that.
TE
Teri
11 months ago
This looks like a tricky one. All that custom class and template stuff is throwing me off a bit. I'll need to really focus and make sure I understand how the set and sorting are working here. Might be worth a closer look at the operator overloading too.
CA
Carma
11 months ago
Okay, let me think this through. The code is creating a set of B objects, sorting them, and then printing them out. I'm guessing the output will be the sorted values of the B objects. I'll need to double-check the comparison operator, but I think I can figure this out.
DE
Derick
12 months ago
Hmm, I'm a bit confused by all the custom class and template stuff. I'll need to carefully read through the code and make sure I understand how the set and for_each are being used. Might be a tricky one.
ZI
Zita
12 months ago
This looks like a pretty straightforward C++ question. I think I can handle it - the code seems to be working with a set of custom objects, so I'll need to pay attention to the comparison operator and output operator.
RO
Roslyn
6 months ago
I’m leaning towards option B for the output.
BE
Belen
7 months ago
But the set constructor takes an array, right?
EL
Ellsworth
10 months ago
No way, it should output the sorted values.
TO
Tommy
10 months ago
Yeah, but `sort` won't work on a set.
LE
Lezlie
11 months ago
I think it will give a compilation error.