In computer science, a pointer is an object in many programming languages that stores a memory address. This can be that of another value located in computer memory, or in some cases, that of memory-mapped computer hardware. A pointer references a location in memory, and obtaining the value stored at that location is known as dereferencing the pointer. As an analogy, a page number in a book's index could be considered a pointer to the corresponding page; dereferencing such a pointer would be done by flipping to the page with the given page number and reading the text found on that page. The actual format and content of a pointer variable is dependent on the underlying computer architecture. Using pointers significantly improves performance for repetitive operations, like traversing iterable data structures (e.g. strings, lookup tables, control tables and tree structures). In particular, it is often much cheaper in time and space to copy and dereference pointers than it is to copy and access the data to which the pointers point. Pointers are also used to hold the addresses of entry points for called subroutines in procedural programming and for run-time linking to dynamic link libraries (DLLs). In object-oriented programming, pointers to functions are used for binding methods, often using virtual method tables. A pointer is a simple, more concrete implementation of the more abstract reference data type. Several languages, especially low-level languages, support some type of pointer, although some have more restrictions on their use than others. While "pointer" has been used to refer to references in general, it more properly applies to data structures whose interface explicitly allows the pointer to be manipulated (arithmetically via pointer arithmetic) as a memory address, as opposed to a magic cookie or capability which does not allow such. Because pointers allow both protected and unprotected access to memory addresses, there are risks associated with using them, particularly in the latter case. Primitive pointers are often stored in a format similar to an integer; however, attempting to dereference or "look up" such a pointer whose value is not a valid memory address could cause a program to crash (or contain invalid data). To alleviate this potential problem, as a matter of type safety, pointers are considered a separate type parameterized by the type of data they point to, even if the underlying representation is an integer. Other measures may also be taken (such as validation & bounds checking), to verify that the pointer variable contains a value that is both a valid memory address and within the numerical range that the processor is capable of addressing. (Wikipedia).
[c][explained] Demystifying Pointers — Function Pointers
Find the complete program on https://www.notion.so/theteachr/Function-Pointers-9848de630cae47a7ad1ca5552d23a66d.
From playlist Demystifying Pointers
Pointers In C Explained | What Are Pointers in C? | C Pointers | C Language Tutorial | Simplilearn
This video by Simplilearn will explain to you about Pointers In C. This C Programming tutorial will explain to you What Are Pointers in C with an example. how to declare and initialize pointers In C. C pointer to an array, C Pointer to function, and pointer to pointer The video will cover
From playlist C++ Tutorial Videos
Learn about the basics of pointers in C. This streaming session will go over the syntax and concepts of pointers. Assumes you are already familiar with the primitive types (int, char, etc.) and with defining functions.
From playlist C Programming
C Programming Tutorial - 56: Introduction to Pointers
In this tutorial we'll check out pointers for the first time in the course! Hope you have fun watching the video.
From playlist The Bad Tutorials: C Programming
A bit different from me, but I felt like I needed a reference video that explained a few things about pointers. Included are the very basics, memory allocation, problems to avoid and smart pointers. This video is aimed at those earlier on with their programming journeys. https://discord
From playlist Interesting Programming
Pointers In C | Pointers In C Programming | C Programming For Beginners | Simplilearn
This Simplilearn video will help you to learn the fundamentals of Pointers in C Programming. Pointers in C are used for file handling. This C Programming for Beginners tutorial will guide you to learn how to implement pointers for memory allocation, deallocation, reallocation, and other me
From playlist C++ Tutorial Videos
From playlist Week 4 2015 Shorts
C Programming: Function Pointers and qsort
In this video I will show you the basics of function pointers in C. They are useful for passing a function as a parameter into another function such as qsort.
From playlist C Programming
Pointers in C / C++ [Full Course]
Pointers in C and C++ are often challenging to understand. In this course, they will be demystified, allowing you to use pointers more effectively in your code. The concepts you learn in this course apply to both C and C++. ✏️ Course developed by Harsha and Animesh from MyCodeSchool. 🔗 R
From playlist C / C++
An introduction to pointers in C. How to declare and use them. We'll see how pointers interact with the call stack and their relationship to arrays.
From playlist C Programming, Fall 2022
An introduction to pointers in C. How to declare and use them. We'll see how pointers interact with the call stack and their relationship to arrays.
From playlist C Programming
C Programming: Pointers and Arrays
Learn about the relationship between pointers and arrays. We'll see that when you pass an array into a function, you're really just passing in a pointer to it. We'll also take a dive into the call stack and see how variables are organized in memory.
From playlist C Programming
MIT 6.172 Performance Engineering of Software Systems, Fall 2018 Instructor: Tao B. Schardl View the complete course: https://ocw.mit.edu/6-172F18 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63VIBQVWguXxZZi0566y7Wf This class is focused on the Cilk runtime system. I
From playlist MIT 6.172 Performance Engineering of Software Systems, Fall 2018
Lec 7 | MIT 6.033 Computer System Engineering, Spring 2005
Virtual Processors: Threads and Coordination View the complete course at: http://ocw.mit.edu/6-033S05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.033 Computer System Engineering, Spring 2005
From playlist CS50 Lectures 2012
Week 5: Monday - CS50 2007 - Harvard University
Structures. Dynamic memory allocation. Pointers. Heap. Digital forensics. File I/O.
From playlist CS50 Lectures 2007
This Pointer In C++ | This Pointer In C++ With Example Program | Pointers In C++ | Simplilearn
In this video on This pointer in C++, we will cover what is This pointer and the working of this pointer in C++. You will also learn how to access the executing object using This pointer in C++. You will get an idea about the features of This pointer in C++ with example program. We will al
From playlist C++ Tutorial Videos
Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
From playlist Computer - Cryptography and Network Security