C++ | Exception Handling | Question 9

#include <iostream> 
using namespace std; 
  
class Test { 
  static int count; 
  int id; 
public: 
  Test() { 
    count++; 
    id = count; 
    cout << "Constructing object number " << id << endl; 
    if(id == 4) 
       throw 4; 
  } 
  ~Test() { cout << "Destructing object number " << id << endl; } 
}; 
  
int Test::count = 0; 
  
int main() { 
  try { 
    Test array[5]; 
  } catch(int i) { 
    cout << "Caught " << i << endl; 
  } 
} 

(A)

Constructing object number 1
Constructing object number 2
Constructing object number 3
Constructing object number 4
Destructing object number 1
Destructing object number 2
Destructing object number 3
Destructing object number 4
Caught 4

(B)

Constructing object number 1
Constructing object number 2
Constructing object number 3
Constructing object number 4
Destructing object number 3
Destructing object number 2
Destructing object number 1
Caught 4

(C)

Constructing object number 1
Constructing object number 2
Constructing object number 3
Constructing object number 4
Destructing object number 4
Destructing object number 3
Destructing object number 2
Destructing object number 1
Caught 4

(D)

Constructing object number 1
Constructing object number 2
Constructing object number 3
Constructing object number 4
Destructing object number 1
Destructing object number 2
Destructing object number 3
Caught 4

Answer: (B)

Explanation: The destructors are called in reverse order of constructors. Also, after the try block, the destructors are called only for completely constructed objects.

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