In the below program , why the destructor is not called and the destructor statement is not displayed ?

Question

2.00/5 (1 vote)

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#include<iostream.h>
#include<conio.h>

class x
{
      public:
             x()
             {
                 cout<<"constructor called";
             }
             void show()
             {
                  cout<<"Show() called";
             }
             ~x()
             {
                 cout<<"Destructor called";
             }
};

int main()
{
    x o;
    o.show();
    getch();
    return 0;
}

Posted 3-Aug-11 4:52am

Ashutosh_g

Updated 3-Aug-11 9:38am

Emilio Garavaglia

v3

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Maximilien 3-Aug-11 11:44am

On VS2008 the destructor gets called; I would assume it does get called in every modern C++ compilter.
Put a breakpoint in the destructor; it should be triggered.

2 solutions

Solution 2

Have checked by executing the program>Which compiler you are using?I am sure destructor will be called.

Posted 3-Aug-11 5:00am

వేంకటనారాయణ(venkatmakam)

Comments

Ashutosh_g 3-Aug-11 11:01am

i am using dev cpp compiler.

Sergey Alexandrovich Kryukov 3-Aug-11 14:42pm

Agree (my 5), but I don't think it has anything to do with a specific compiler -- please see the answer by Nemanja Trifunovic and my comment to it.
--SA

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Nemanja Trifunovic · Accepted Answer · 2011-08-03T04:55:00

Solution 1

I bet it is called - you just don't see it because it gets executed after the getch() function.

Why don't you put a getch() at the end of your destructor? You'll see the message then.

Posted 3-Aug-11 4:55am

Nemanja Trifunovic

Comments

Ashutosh_g 3-Aug-11 10:58am

i put the getch method at the end of destructor function but result was not displayed.........

mbue 3-Aug-11 13:00pm

No you didnt. You have to do this in that way:


int main()
{
  {
    x o;
    o.show();
  } // <-- destructor called
  getch();
  return 0;
}

Sergey Alexandrovich Kryukov 3-Aug-11 14:39pm

I think you're right but the idea of moving "getch()" to the destructor is weird -- OP could think this is a valid programming technique, not just the experiment as you probably mean. It's much better to recommend using debugger :-).
Another way would be re-directing console output:
>program.exe > output_file.txt
I voted 4.
--SA