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C++ Institute CPP Exam - Topic 7 Question 62 Discussion

Posted by Penney on Feb 08, 2023 at 12:16 PM

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<

templatestruct Out {

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};

vector v1(t, t+10);

sort(v1.begin(), v1.end());

for_each(v1.begin(), v1.end(), Out(cout));cout<

return 0;

}

Program outputs:

Suggested Answer: C

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32 comments · newest first
FR
Franchesca 11 months ago
Wait, how does it sort when the vector is initialized with integers?
MA
Man 11 months ago
Totally agree, it sorts the vector correctly!
GE
Georgiann 12 months ago
I think it might throw a compilation error.
GL
Glendora 12 months ago
It should output 1 2 3 4 5 6 7 8 9 10.
TU
Tuyet 12 months ago
The code compiles fine.
CO
Coral 1 year ago
I believe the sorting should arrange the values in ascending order, so I think option B is correct, but I hope I’m not missing something about the vector.
CH
Chauncey 1 year ago
I'm a bit confused about the vector initialization with the array. I feel like it might cause a compilation error, but I can't recall the specifics.
BE
Bernardo 1 year ago
I remember a similar question where we had to sort a custom class, and it worked as expected. So, I'm leaning towards option B for the output.
LU
Luisa 1 year ago
I think the code should compile fine since all the necessary operators and constructors are defined, but I'm not completely sure about the vector initialization.
JO
Joye 1 year ago
Hmm, I'm not sure about this one. Embedding them directly in the code seems like a bad idea, but I'm not sure if a hidden file is really that much more secure. Maybe I should consider changing them periodically instead?
TR
Tracey 1 year ago
This looks like a straightforward PROC PRINT question. I think I've got this one figured out.
LE
Leslie 1 year ago
I've got a good feeling about this one. The details in option A seem to match the description of Unified Data Management the best.
ER
Erinn 1 year ago
I remember we debated if this statement oversimplifies both communism and radical Islam. Maybe it's misleading to equate them?
SE
Selma 1 year ago
Ah, I see what they're doing here. The sort function should work just fine, and the output should be the sorted vector of B objects. Yep, B is the correct answer for sure.
LE
Leonard 1 year ago
Haha, I can already see the problem. They forgot to overload the << operator for the B class. Gotta love those pesky compilation errors!
RI
Ricarda 1 year ago
↳ replying to Leonard
User3
TA
Tanesha 1 year ago
↳ replying to Leonard
User2
GR
Gregg 1 year ago
↳ replying to Leonard
Compilation errors can be tricky to debug sometimes.
GR
Gregg 1 year ago
↳ replying to Leonard
Definitely, overloading the << operator is crucial for custom classes.
GR
Gregg 1 year ago
↳ replying to Leonard
Yeah, that's a common mistake.
QU
Queen 1 year ago
This is a tricky one. The code includes some custom operator overloading, so it might not be as straightforward as it seems. I'll go with option B, just to be safe.
JO
Jolanda 1 year ago
Hmm, the code looks like it's trying to sort a vector of custom objects. My guess is that it will compile and run, and the output will be a sorted list of the object values.
NI
Nickolas 1 year ago
↳ replying to Jolanda
User 1
RO
Rosendo 1 year ago
↳ replying to Jolanda
User 2
NI
Nilsa 1 year ago
↳ replying to Jolanda
User 1
KA
Kasandra 1 year ago
↳ replying to Jolanda
Looks like the code is sorting a vector of custom objects.
AS
Ashlyn 1 year ago
↳ replying to Jolanda
The output will be a sorted list of object values.
SY
Sylvie 1 year ago
↳ replying to Jolanda
It will compile and run successfully.
GR
Gretchen 1 year ago
↳ replying to Jolanda
B) 1 2 3 4 5 6 7 8 9 10
AA
Aaron 1 year ago
I'm not sure, but I think the answer is B) 1 2 3 4 5 6 7 8 9 10 because the for_each function is used to output the sorted vector elements.
KA
Kami 1 year ago
I agree with Yen, the code uses the sort function to sort the vector of objects in ascending order.
YE
Yen 2 years ago
I think the answer is B) 1 2 3 4 5 6 7 8 9 10 because the code sorts the vector in ascending order.
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