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What is Void Pointer in Embedded C and why is it used? |
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Answer» Void pointers are those pointers that POINT to a variable of any type. It is a GENERIC pointer as it is not DEPENDENT on any of the inbuilt or user-defined data types while referencing. During dereferencing of the pointer, we require the correct data type to which the data needs to be dereferenced. For EXAMPLE: int num1 = 20; //variable of int datatype void *ptr; //Void Pointer*ptr = &num1; //Point the pointer to int dataprint("%d",(*(int*)ptr)); //Dereferencing requires specific data type char c = 'a';*ptr = &c; //Same void pointer can be used to point to data of different type -> reusabilityprint("%c",(*(char*)ptr));Void pointers are used mainly because of their nature of re-usability. It is reusable because any type of data can be STORED. |
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