Q:
IS VOID POINTER ARITHMETIC A VALID ONE? WHY?
belongs to collection: C INTERVIEW QUESTIONS AND ANSWERS
C INTERVIEW QUESTIONS AND ANSWERS
- WHAT IS C LANGUAGE?
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- WHAT IS MACRO? WHY DO WE USE MACRO?
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- WHAT IS POINTER IN C?
- WHAT IS NULL POINTER IN C?
- WHAT IS NULL IN C?
- WHAT IS VOID POINTER IN C?
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- WHAT IS FILE POINTER IN C?
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- WHAT IS CONST POINTER IN C?
- IS POINTER ARITHMETIC A VALID ONE? WHICH ARITHMETIC OPERATION IS NOT VALID IN POINTER? WHY?
- IS VOID POINTER ARITHMETIC A VALID ONE? WHY?
- WHAT IS THE DIFFERENCE BETWEEN NULL AND ZERO?
- WHAT IS THE DIFFERENCE BETWEEN NULL POINTER AND UNINITIALIZED POINTER IN C?
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- WHAT ARE LIBRARY FUNCTIONS AND THEIR USE IN C LANGUAGE? CAN WE WRITE OUR OWN FUNCTIONS AND INCLUDE THEM IN C LIBRARY?
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- WHAT IS INLINE FUNCTION IN C?
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- WHY ARE WE USING POINTERS IN C?
- WHAT IS STATIC VARIABLE IN C?
- WHAT IS EXTERN AND STATIC FUNCTION IN C?
- WHAT IS THE DIFFERENCE BETWEEN POINTER AND ARRAY IN C?
- WHAT IS THE USE OF MAIN() FUNCTION IN C?
C programming
Arithmetic operation on void pointer is not valid one. Void pointer is a generic pointer. It is not referring int, char or any other data type specifically. So, we need to cast void pointer to specific type before applying arithmetic operations.
Note:
- Pointer arithmetic itself is not valid one. Pointer addition, multiplication and division are not allowed as these are not making any sense in pointer arithmetic.
- But, two pointers can be subtracted to know how many elements are available between these two pointers.
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