Delete operator

Question

Hello

Refer below code :

#include <iostream>
using namespace std;

class Test
{
public:
Test () {cout << "constructor" << endl;}
~Test () {cout << "destructor" << endl;}

};

int main()
{

Test* obj = new Test();
delete obj;
delete obj;
delete obj;
delete obj;
return 0;
}

Can someone explain output of this ? Why it prints destructor twice even though delete is called five times... As far as I recall, I somewhere read that one can delete same memory location twice , but why? and after that, delete call for future thrice should result in memory corruption.... Any thoughts?

Answer 1

Ketan Lalcheta I think that depends by compiler/system but i repeat, dont do it because standards say that result its undefined

Answer 2

Into C++ standard, a call to delete on a not-new allocated memory has undefined result (depends on multiple factors)... Then dont do it.

Answer 3

This is allocated memory by New operator.. Why it works only exactly for twice...???