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The question posed is a bit difficult to answer as there are no context specific clues (are we talking C/C++ here, or something more general such as object references in Java?), so an answer relating to C is given. Many times when writing a program it becomes necessary to pass a reference to a piece of data to a function, or perhaps to store a reference to a piece of data -- especially when writing a data structure that stores references to many different data (of many different types). In such a case the easiest way is to create a void pointer reference (void*). Now "casting the pointer" in order to correctely dereference the data is simply a matter of knowing the data type you are casting to, and indicating that it is a reference to a piece of data of that type. For example, suppose you have a structure called foo, that contains a field called bar, then: void printbar(void* myfoo) { printf("Bar = %s\n", (struct foo*)myfoo->bar); } should solve your problem. In this example you are indicating that the void pointer myfoo (which holds a memory reference) should be cast to a pointer that holds a memory reference to a piece of data of the type stuct foo.

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โˆ™ 2006-01-23 13:00:45
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Q: How do you do casting with pointers?
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What are void pointers?

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Metal casting can be done thro sand casting ,investment casting , pressure die casting methods


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Die casting.


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Because the laser pointers are much easier to use than the ball pointers. The ball pointers are often difficult to move around while the laser pointers can move in any direction without "getting stuck"


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Most 3 pointers in a high school basketball game?

Marina High School holds the title with 384 3 pointers in a season and 29 3 pointers in a game.


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Lost wax casting and investment casting are two names for the same thing


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Using this you specify that two pointers can't point on the same address


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