2 pointers pointing to same variable

[xenoviaquarta]

say, we have 2 pointers pointing to same variable
if i delete the one, what would happen if i dereferenced the other one?

[Disch]

You don't delete pointers, you delete the memory the pointer points to.

int* a = new int;  // new creates an unnamed integer.  Let's call it 'foo'
   // 'a' points to 'foo'

int* b = a;  // 'b' also points to 'foo'

// at this point, both 'a' and 'b' are pointing to the same thing:  'foo'

delete a;  // does not delete a, but instead deletes what a point to.
   // since 'a' points to 'foo', this deletes 'foo'
   // 'foo' no longer exists


// a and b did not change.  They still point to the memory once assigned to 'foo', but since
// 'foo' no longer exists, they are BAD POINTERS and attempting to dereference either
// of them results in undefined behavior 

[MiiNiPaa]

The same thing if you dereference deleted one. Undefined behavior. You are trying to access memory which is no longer belongs to the program.

[xenoviaquarta]

got it guys! thanks, this is a late reply sorry