What does a run-time "null pointer assignment" error mean?
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Answer / varghese
its means u r assingnning a pointer to an invalid address
location
| Is This Answer Correct ? | 9 Yes | 1 No |
Answer / guest
It means that you've written, via a null pointer, to an
invalid location
| Is This Answer Correct ? | 0 Yes | 6 No |
how to use virual function in real time example
Go through this linked list concept.While traversing through the singly linked list sometimes the following code snippet "while(head != NULL)" is used and other times "while(head->link != NULL)"is used(Here head is the pointer pointing to the first node,node has two parts data part and link part).What is the difference between head != NULL and Head->link != NULL and in which situation are they used?
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C 
