double-pointer Archives

[Solved] Learning C++ pointer runs into core dump with following code, I really don’t why?

December 23, 2022 by Kirat

Change the following statements int ** dp = new int *; *dp = array; Or even you could write one statement instead of the two above int ** dp = new int *( array ); Also do not forget to free the allocated memory delete dp; delete []array; As for your code then you are … Read more

[Solved] Local variable values and Address getting retained even after function completes Execution [closed]

November 27, 2022 by Kirat

How is value getting retained even after function completing execution? Undefined behavior (UB). It might appear to “work”, but that is not specified to be so by C. fun(&ptr); runs fine, yet printf(“%p”,ptr); is UB as the value ptr is no longer valid. Many systems will tolerate this UB. De-referencing ptr, with printf(“%d\n”,*ptr); is even … Read more