C++ | Exception Handling | Question 9

Difficulty Level : Medium
Last Updated : 24 Nov, 2013

#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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