CPP Real Exam Prep DEMO

Question 1: What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
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 == b.a; }
};
bool compare(const A & a, const A & b) { return a == b; }
int main () {
int t[] = {1,2,3,3,5,1,2,4,4,5};
vector<A> v (t,t+10);
vector<A>::iterator it = v.begin();
while ( (it = adjacent_find (it, v.end(), compare)) != v.end()) {
cout<<it?v.begin()<<" ";it++;
}
cout<< endl;
return 0;
A. program outputs: 2 3
B. program outputs: 2 7
C. program outputs: 3 8
D. compilation error
E. program will run forever
Correct Answer: B