C++ faq lite marshall cline. C++ FAQ Lite : Download Free Book

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Ned Batchelder: C++ FAQ Lite

c++ faq lite marshall cline

Try very hard to avoid using define since. If you're writing C++ code, you should use f. Now that's the general rule of thumb. For example, suppose your program is working with shipping crates. Bottom line: the book and this Lite document are not the same.

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C++ FAQ Lite : Download Free Book

c++ faq lite marshall cline

It adds cost without adding any value to compensate for that cost. When writing portable code, you shouldn't make additional assumptions about these sizes. And in and the three questions that follow it , Cline explores all of the fiddly details that you need to consider when writing macros of any interesting complexity. If you really want that, you can use a cast:. The first option is easiest; the second and third are better. So the whole solution is harder to write. It is normally much better to encapsulate your pointers in a class that has a safe and simple interface.

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C++ FAQ LITE — Frequently Asked Questions

c++ faq lite marshall cline

The C++ compiler provides an automatic conversion from Color to int, and the converted values will be, in this case, 0, 1, and 2 respectively. An expression of type float can be converted to a temporary double, but that doesn't mean float is a subtype of double. The f void style is legal in C++, but only to make it easier to compile C code. For example, suppose you want to get a copy of a string, fiddle with the copy, then append another string to the end of the fiddled copy. The above conversion is very different from a subtype relationship, such as the relationship between derived class Car and its base class Vehicle.

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[29] Newbie Questions / Answers, C++ FAQ Lite

c++ faq lite marshall cline

Should it ignore the Foo and look for a } catch Bar e { handler? After all, if you're successful at what you do, someone else might want to use it somewhere else. Every data member inside your object should clean up its own mess. ListPosition would be a of class List, so List can hide its innards from the outside world else the innards of List would have to be publicized via public member functions in List. There is one more piece of fine print: where the const identifier should be defined. Sometimes it is used for readability, and sometimes it is used because expressions like! And if it is just an implementation detail, how will the LinkedList let users access each of the elements in the LinkedList one at a time? For example, programmers should choose between! Or a set method that takes a LinkedList? For insights on the underlying ideas and issues of floating point computation, start with David Goldberg's paper, or. All these occurances of the number 5.

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[3] C++

c++ faq lite marshall cline

In other words, what should a LinkedList look like from the outside? In that sense there really are 16 different choices. An expression of an enumeration type can be converted to a temporary int. Don't waste your time worrying about whitespace: as long as your team uses a consistent whitespace style, get on with your life and worry about more important things. And anyone who's seen Star Trek 3 knows that the good of the many outweighs the good of the few. Copyright © 1991-98, Marshall Cline, cline parashift. The best way to look at this C programmers: hang on to your seats! But if you have an old compiler, you may have to. During stack unwinding, all the local objects in all those stack frames are destructed.

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[2] On

c++ faq lite marshall cline

If one of those destructors throws an exception say it throws a Bar object , the C++ runtime system is in a no-win situation: should it ignore the Bar and end up in the } catch Foo e { where it was originally headed? Here are a few details: There is no universally accepted coding standard when it comes to whitespace. Yes, in the sense that has a vector template that provides this behavior. You can then access objects in the container indirectly through the pointers enjoying polymorphic behavior. You can get close but you can't represent it exactly. No, in the sense that built-in array types need to have their length specified at compile time.

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Super

c++ faq lite marshall cline

For example, if x is of type float, the expression x + 5. } Remember: in a reuse-oriented world, there will usually be many people who use your class, but there is only one person who builds it yourself ; therefore you should do things that favor the many rather than the few. Think of it as offering a little help to a few people. Just because a particular variable can be declared as short doesn't necessarily mean it should, even if you're trying to save space. Sigh; I wish nobody actually thought that way.

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Super

c++ faq lite marshall cline

The author of this home page is solely responsible for its contents. C++ guarantees , short is at least 2 bytes, int is at least 2 bytes, and long is at least 4 bytes. All life comes to a catastrophic end. Hopefully that will give you a foothold. Derived classes do not get access to private members of a base class.

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C++ FAQ

c++ faq lite marshall cline

These new features and technologies are iconed to help you quickly find what is new and different in this edition. The reason the code in was so tricky and error prone was that it used pointers, and we know that. As long as the team is using a consistent whitespace strategy, drop it. } But the above code is wrong, and it can cause a disaster at runtime. Some people believe one should never have numeric literals scattered in the code. They believe all numeric values should be named in a manner similar to that described above. Every define macro effectively creates a new keyword in every source file and every scope until that symbol is undefd.

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Should every C++ programmer read C++ FAQ book by Marshall Cline?

c++ faq lite marshall cline

The ultimate goal is to reduce both the learning curve and the defect rate. The solution is to make sure the value 5. To dig a little deeper, let's examine what the decimal number 0. You can download an , a , and the for the book's examples. Thus no one could accidentally subvert the reference counted mechanism.

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