Re: [Dev-C++] Re: C and C++

[Per W. <pw...@ia...>]

We had a long discussion about memory layout and problem porting Fortran
routines efficiently to C++ some moths ago :-)

Well, language comparisons will always pop up in the list more or less
regularly.

One thing about size of binaries.

For a small binary, even a little extra results in a large proportional
difference.

Some few reasons why C++ applications gets larger:
- Mangled names results in larger debug information.
- More complex data structures in the header files results in larger debug
info.
- Most OS have C-like API, so a lot of low-level C++ classes must in the
end call C function, while the C app sometimes could call the C function
directly.
- C++ compiled with RTTI adds a lot of extra book-keeping in the binary.
- Support for some combinations of multiple-inherritance results in a lot
of extra code to type-cast between super- and sub-classes.
- Exception support, to correctly find all auto-declared objects to
destruct on the stack.
- Template code that results in code expansion, where the application gets
several versions of similar code.

Yes, there are a number of reasons why a C++ application might be smaller
too, such as good use of virtual methods to better reuse code in abstract
base classes etc...

However, the most common reason for larger C++ binaries is that libc++
adds in a lot of extra goodies that quickly bloats small programs, but
makes large applications grow slower because of code reuse.

/Per W

On Wed, 23 Apr 2003, Samuel Keding wrote:

> Hey,
>
> A language doesn't equal religion. For those of you who can only read C or C++
>
> bool isEqual = (language == religion)
>
> cout or printf isEqual
>
> On the console appears 0.
>
> It doesn't really matter a lot. C can be more effiecent at times, and ease is a matter of opinion. Some problems are easier to understand in the object oriented sense. In that case, C++ will probably be easier. In any case a langauge is a tool. If your welding you might want a welding torch. However, you probably do not want to use a welding torch when drying the clothes. You probably want to use a dryer for that. C, C++, Java, Fortran, use them where it proves useful. Oh, one other thing, Fortran is evil. Do not use it.
>
> :D
>
>
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