October 2004
Beginner
408 pages
9h 24m
English
Content preview from C Programming: Visual Quickstart GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Dereferencing Pointer Variables
So far we've used the address-of operator to find the memory addresses of variables. These values have also been stored in pointer variables. Addresses themselves are not really that interesting, though; in the end we want to work with the actual data stored in memory at those addresses. C provides the dereferencing operator (*) to do just that.
Given a pointer variable that contains an address, the * operator allows you to read and write the value stored at the place in memory whose address is stored in the pointer variable. This process is called dereferencing a pointer.
The dereferenced address can be used wherever the original variable could be. So if x is an integer pointer variable, then *x can be used wherever ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.