Pointer Pointer When should a double indirection be used in C Can anyone explain with a example What I know is that a double indirection is a pointer to a pointer Why would I need a pointer to a pointer
23M subscribers in the explainlikeimfive community Explain Like I m Five is the best forum and archive on the internet for layperson friendly A pointer to a pointer is used when a reference to a pointer is required For example when you wish to modify the value address pointed to of a pointer variable declared in a calling function s scope
Pointer Pointer
Pointer Pointer
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Instead val INDEX is equivalent to array INDEX Derefrencing val just gives you the first pointer in the array You haven t explained how to make a pointer to an array of pointers but you This wikipedia article will give you detailed information on what a pointer is In computer science a pointer is a programming language data type whose value refers directly to or points to
You would not choose a pointer over say a normal data type like float they simply have different purposes Pointers are useful where you require high performance and or compact memory Pointer to members are C s typesafe alternative to the rather unsafe offsetof construct from C They both return the information where inside a class or struct a certain field is located
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I m coming from a Java background and have started working with objects in C But one thing that occurred to me is that people often use pointers to objects rather than the objects Like an int a pointer can be stored in a variable A variable that stores a pointer could be called a pointer variable So what s the difference between a pointer and a pointer variable The first one is a value
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When should a double indirection be used in C Can anyone explain with a example What I know is that a double indirection is a pointer to a pointer Why would I need a pointer to a pointer
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23M subscribers in the explainlikeimfive community Explain Like I m Five is the best forum and archive on the internet for layperson friendly
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Pointer Pointer - [desc-13]