What happens when you attempt to compile and run the following code?#include #include #include #include #include using namespace std;class A {int a;public:A(int a):a(a) {}int getA() const { return a;} void setA(int a){ this?>a = a;}bool operator < ( const A & b) const { return a

C++ Institute CPP Exam - Topic 11 Question 119 Discussion

Actual exam question for C++ Institute's CPP exam

Question #: 119
Topic #: 11

[All CPP Questions]

What happens when you attempt to compile and run the following code?

#include

using namespace std;

class A {

int a;

public:

A(int a):a(a) {}

int getA() const { return a;} void setA(int a){ this?>a = a;}

bool operator < ( const A & b) const { return a

};

struct display { void operator() (const A & a) {cout << " " << a.getA();} };

struct add10

{

void operator() (A & a) { a.setA(a.getA()+10) ;}

};

int main() {

int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };

vector v1(t, t + 10);

set s1(t, t + 10);

for_each(v1.begin(), v1.end(), add10()); for_each(v1.begin(), v1.end(), display());

for_each(s1.begin(), s1.end(), add10()); for_each(s1.begin(), s1.end(), display());

return 0;

}

Aprogram outputs: 10 5 9 6 2 4 7 8 3 1 1 2 3 4 5 6 7 8 9 10

Bprogram outputs: 20 15 19 16 12 14 17 18 13 11 1 2 3 4 5 6 7 8 9 10

Cprogram outputs: 20 15 19 16 12 14 17 18 13 11 11 12 13 14 15 16 17 18 19 20

Dcompilation error

Show Suggested Answer

Suggested Answer: D

by Kallie at Mar 02, 2026, 05:50 AM

Limited Time Offer

25%

Off

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

Contribute your Thoughts:

Submit Cancel

Xuan

3 days ago

I thought it would output the original numbers first, then the modified ones.

upvoted 0 times

...

Ilda

8 days ago

Totally agree, that syntax is wrong!

upvoted 0 times

...

Oretha

13 days ago

Looks like a compilation error due to the `this?>a` line.

upvoted 0 times

...

Doretha

19 days ago

I feel like the output should be option B, since we're adding 10 to each element in the vector, but I'm not completely confident about the set part.

upvoted 0 times

...

Genevive

24 days ago

I practiced a similar question where we had to modify a vector and then print it, but I can't recall if the set will reflect those changes too.

upvoted 0 times

...

Freeman

29 days ago

I remember something about how sets work with custom classes, but I'm not sure if they will actually store the modified values after using `add10`.

upvoted 0 times

...

Tamala

1 month ago

I think there might be a compilation error because of the `this?>a` line in the `setA` method. That doesn't look right.

upvoted 0 times

...