Pointer to Pointer in C (Double Pointer) By: Rajesh P.S.Pointers to pointers, also known as double pointers, are a concept in C where a pointer variable holds the memory address of another pointer variable. This allows for indirect access to a memory location and is particularly useful in...
This concept is easy to understand as the name simplifies the concept. Yes, as the name itself suggests, this type of pointer cannot change the value at the address pointed by it. Lets understand this through an example : char ch = 'c'; char *ptr = &ch *ptr = 'a'; In the above...
Pointers in C has always been a complex concept to understand for newbies. In this article, we will explain the difference between constant pointer, pointer to constant and constant pointer to constant. This article is part of the ongoing series on C pointers:part 1,part 2, part 3 (this a...
Let’s reinforce this concept with a brief analogy. Imagine that I am standing in a library and someone walks up to me and says, “Who is Richard the Lionheart?” If I respond by saying, “The king of England from 1189 to 1199,” I am like a normal variable. I am providing the...
How to declare a Pointer to Pointer (Double Pointer) in C? int**pr; Here pr is a double pointer. There must be two *’s in the declaration of double pointer. Let’s understand the concept of double pointers with the help of a diagram: ...
Pointer concept is in Java. It internally invokes pointers.It would be too complex when we use pointers. When we use pointers we will face some problems like memory leakage, eventhough when we retrieve the existing value from user-defined datatype(arrays,strings etc...) using pointers, it ...
Conclusion In this topic, we covered all the aspects of string pointer very seriously to understand the concept of the string pointer. It is very understandable that through a pointer, we can easily access the entire index of the string very fast and easy to make the code robust. About...
I hope this post will be helpful to understand the concept of pointers in C++. Here, I just wrote simple examples of pointers in C++. If you want to practice more examples on pointers, visit: C pointers examples/programs.C++ - Size of structure with no members C++ - exit(0) vs exit...
Pointers in C Naveen Toppo & Hrishikesh Dewan 2441 Accesses Abstract Like any other variable, you need to first understand the basics of pointer variables. The basics include declaration, definition, and usage. This chapter explains the concept of pointer variables. The emphasis is on the usage...
Misunderstanding of the fundamental concept of function pointers can create issues in the project. This issue can waste a lot of your time and can be the cause of project failure. The problem with a pointer to a function is that it is one of the most difficult topics in C language. Only...