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What is a null pointer?

By: srisid
Date: Wed-Jun-15-2016-
Response
3
There are times when itís necessary to have a pointer that doesnít
point to anything. The macro NULL, defined in , has a value thatís
guaranteed to be different from any valid pointer. NULL is a literal zero,
possibly cast to void* or char*. Some people, notably C++
programmers, prefer to use 0 rather than NULL.
The null pointer is used in three ways:
1) To stop indirection in a recursive data structure
2) As an error value
3) As a sentinel value.
Date: Wed-Jun-15-2016
Response
What is 1 + 100



Helpfulbox Now Offers Free POS Software

for restaurants, kiosk, and any other retails business completely free. It can be used as windows cashier system or as full blown POS. You will able to print to kitchen, display orders on the kitchen screen, manage inventory, employee, report, customer loyalty offers, employee management, delivery address track and much more, all for free.

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