pointer is depicted by '*' . this is  to differentiate a pointervariable from normal variable. it will tell the compiler that it is not a normal variable, but it is a pointer variable which is holding the address of another variable. so use of ...
Wild pointers are also known as Dangling pointers. Pointers that do not point to a valid object of the appropriate type, or to a distinguished null pointers value in language which support this. ...
When a variable is declared as being a pointer to type void it is known as a generic pointer. Since you cannot have a variable of type void, the pointer will not point to any data and therefore cannot be dereferenced. It is still a pointer though, to ...
Global Pointer Example Program The following walkthrough will illustrate a simple example of global pointers. There are actually two seperate source code files involved, since, in this example, we are going to be executing ...
In 16 bit development environment like DOS or WIN 3.0 memory management is done in terms of segment:offset addressing style. so in this environment we have segment registers like CS,DS.SS,ES if we declare a near pointer we will be able to access the pointer ...
Any time a pointer is used as a condition, it means “Is this a non-null pointer?” A pointer can be used in an if, while, for, or do/while statement, or in a conditional expression.
The hardest part about using a pointer-to-function is declaring it. Consider an example. You want to create a pointer, pf, that points to the strcmp() function. The strcmp() function is declared
Pointers to functions are interesting when you pass them to other functions. A function that takes function pointers says, in effect, “Part of what I do can be customized. Give me a pointer to a
This is paranoia based on long experience. After a pointer has been freed, you can no longer use the pointed-to data. The pointer is said to “dangle”; it doesn’t point at anything useful.
Sometimes you can get away with using a small memory model in most of a given program. There might be just a few things that don’t fit in your small data and code segments. When that happens, you
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