What is the difference between a NULL pointer and a void pointer?
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20. What is the difference between a NULL pointer and a void pointer?
A NULL pointer is a pointer of any type whose value is zero. A void pointer is a pointer to an object of an unknown type, and is guaranteed to have enough bits to hold a pointer to any object. A void pointer is not guaranteed to have enough bits to point to a function (though in general practice it does).
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