C Foundation

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Functions

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String

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Pointer

What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer

Structure

What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def

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What is Union

Files

What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

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What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Null Pointer vs Void Pointer

Comparing null pointer and void pointer is totally insane. Below table describles clearly about null pointer and void pointer.

Null Pointer vs Void Pointer - Table Representation

The following table clearly compare Null pointer against void pointer.

Null Pointer Void Pointer
Null pointer is specially reserved value of a pointer. Void pointer is a specific pointer type.
Null pointer suits well for all datatypes. Void itself a datatype of size 1.
int, char, float, long, double are all datatypes are supported. void datatype is alone supported.
Null pointer is used for assigning 0 to a pointer variable of any type. Void pointer is used for storing address of other variable irrespective of its datatype.

Pictorical View

The following diagram clearly demonstrate that comparing void pointer and null pointer is very much likely to compare apple with van and not apple with windows

null pointer vs void pointer in c

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