After the declaration, we need to initialize a pointer. The following example represents the initialization of the pointer: int x=45; int *ptr; ptr=&x; These expressions state that the value 45 is assigned to the variable x, and the pointer “ptr” stores the address of the variable x....
Learn about C pointer arithmetic, its operations, and how to effectively use pointers in C programming for better code manipulation.
The main objective of the pointer is mainly: Extended concept of pointer Pointer’s arithmetic 1. Extended concept of pointer: Xpqr 1000 2000 3000 4000 Example: 123456789101112131415 #include<stdio.h> Void main () { Int x = 5 , *p , **q , ***r ; p = &x ; q = &p ; r = &...
http://stackoverflow.com/questions/3523145/pointer-arithmetic-for-void-pointer-in-c When a pointer to a particular type (say int, char, float, ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, ...
In the following example we regard the task to perform one of the four basic arithmetic operations. The taskisfirst solvedusingaswitch-statement. Then itisshown, how the same can be doneusinga function pointer. It's only an example and the task is so easy that I suppose nobody will ...
Void pointers can point to any memory chunk. Hence the compiler does not know how many bytes to increment/decrement when we attempt pointer arithmetic on a void pointer. Therefore void pointers must be first typecast to a known type before they can be involved in any pointer arithmetic. ...
C - Pointer Address Operators C - Accessing Variable Using Pointer C - Address of (&) & Dereference (*) Operators C - NULL Pointer C - Pointers as Argument C - Pointer Arithmetic C - Pointer to an Array C - Evaluation of Statement '*ptr++' C - Pointer & Non-pointer Variables Declara...
In this example, we are passing a pointer to a function. When we pass a pointer as an argument instead of a variable then the address of the variable is passed instead of the value. So any change made by the function using the pointer is permanently made at the address of passed variab...
and how to use them efficiently in C language by defining them using examples. Pointer is helpful to reduce the size of code and is also used to improve the performance of huge programs. You can also use pointers to perform the various tasks like arithmetic operations, updating of data, ...
1Pointer arithmetic There are four arithmetic operators that can be used in pointers: ++, --, +, - 2Array of pointers You can define arrays to hold a number of pointers. 3Pointer to pointer C allows you to have pointer on a pointer and so on. ...