On Mon, 2008-04-07 at 12:25 -0400, max bianco wrote: > I want to learn C and I know there are quite a few programmers on this > list. I am looking for a couple of good books on learning C. I am not > exactly a beginner but I am no expert and i would like to start going > over everything from scratch. So if I could get some referrals to a > couple of books I would greatly appreciate it. I am looking for a good > thorough beginners guide to C and also something for the intermediate > programmer as I expect to get through the former in fairly short > order. I ultimately will be directing my efforts at kernel hacking. As > always , any advice and or opinion is gratefully received. > > Max > Hi, Max, There are several good books out there for C. The base language reference is The C Programming Language by Kernigan and Ritchie. C is a very compact language, and this book shows the real underlying structure. However most C programming is done by calling Library routines. A book that a lot of colleges use is Teach Yourself C or Teach Yourself C++. The thing to remember is that C is a functional language, where you have to design the data structures, and C++ is object oriented, so while the underlying code operations are the same, the manner in which they are accessed is different. Most programs today are written in C++ because the object orientation removes some of the arduous tasks from programming, that is managing data structures separately from code, and keeping the code coherent with the data structure. With objects the data structure is the object, and the code is assigned to the object, so for example if the object is car, then the function call for turning the car might be car.turn(left) in object code. In functional code there would be a structure for the car with various attributes, one of which might be direction. So to get the car to turn, the operation might look like car.direction+=LEFT Where direction would be a property of the car structure, and LEFT would be some angle which would be added to the current value of direction. Note that in the object portion, you would also have to define left and what the direction might look like, and the function turn would adjust the direction by the value of left. They both do the same operation, however the object version is less direct in coding, and more obtuse because you may not be able to even see the function or the direction value if they were controlled by the program as private data. This is a bit off what you asked, but is important that you get the correct information. C is one language and C++ is a different language because of this structural difference. Along with the correct book, there are some books referred to as primers. One of my favorites is the C Primer +. Reading code will help you to see what constitutes good practice vs bad practice. Essentially if you can follow the code, and it is well commented and follows the comments well, that is good coding. You will see lots of other varieties from OK to horrible as you read pages. Worst in my book are tutorials with a page of code with no comments other than the text. Even the most trivial algorithm should always have a comment telling what its input is, what its output should be and preferably illustrating how that result is obtained. But many authors don't bother, and we tend to follow what we learn, so there are reams and reams of programs out there with few or no comments at all. May you never have to debug one of them. Others here will suggest other books. Check them all out on line or at libraries to see what you think will help you. Pick one and read it through first before trying to code. It is dry reading, but once you go all the way through it, it will make more sense why the exercises lead you to new understanding. Regards, Les H
