Câu 69: CPP: C++ Certified Professional Programmer

What happens when you attempt to compile and run the following code?#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; } operator int() const {return a;}};int main () {int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};set s (t,t+15);cout<<equal(s.begin(), s.end(), t)<<endl;return 0;}Program outputs:

1. A. true
2. B. false
3. C. 1
4. D. 0 — đáp án hiện tại
5. E. compilation error