> -----Original Message-----
> From: Leland F. Jackson, CPA [mailto:smvfp (at) mail .D.O.T smvfp.com]
> Sent: Wednesday, April 30, 2003 7:14 PM
> code. C is the base language and C++ add functionality to C=20
> through foundation classes which are built from C code. The=20
> class libraries come with objects that are little more that =20
> shapes and properties that allow a programmer to quickly=20
> assemble programs of windows, forms, dialog, etc. =20
Not really. Straight C does not support classes, and therefore has very =
weak, if any OOP abilities.
> Microsoft's operating system itself is written in C. The=20
Depends on what part of the OS. I'm sure some is probably written in raw =
assembly language, others parts in C, and I'm sure some is written in =
C++, as I've seen source file names in error messages and such(or they =
just named their files *.cpp for some other reason).
> windows foundation classes are used to build Window O/S=20
> dialogs, windows, forms, etc.=20
The Windows API is used for this. There are foundational classes written =
in C++ that abstract this, such as MFC, but nothing directly in the =
C/C++ language.
> Also, other programs like VB,=20
> Office, IE, and outlook express use the same foundation=20
> classes which gives everything a consistent look and feel.
All Windows applications, at some point, are written to the Windows API. =
VFP took the minimalistic approach, so I've observed and been told, of =
just implementing the outer window and a couple inner ones, and creating =
their own controls instead of re-using those already in the Windows API. =
This is what constitutes for the slowness of rich VFP GUI's.
> Although C++ makes it easy to build application, it carries a=20
> lot of overhead. At one time, C++ was not used because it=20
> was simply to slow. C++ has come to the front of=20
> programming, because of the technological advances in the=20
> Microprocessor and low cost of memory and disk space, which=20
> is exponentially greater today than it was only a few years=20
The difference between C and C++ code is all in the algorithms used, and =
the quality of the assembly code created by the compiler. C++ wasn't =
accepted with open arms, as many procedural programmers are/were scared =
of OOP.
> FoxPro is still based on its own C/C++ libraries. The Visual=20
> FoxPro database engine, vfp.exe, and the runtime are written in C.
Didn't Mike just say that VFP was written, at least partially, in C++? I =
swear I read a message a couple hours ago where he stated that quite =
clearly......
> Mose games are written in pure C, because C++ object oriented=20
> code is just to slow. The C code must work with graphic to=20
> make the game come to life and it must be very fast. There=20
Many games are written in C++, as OOP makes game creation far easier. =
Graphics routines are often written in C and assembly for speed reasons.
> is nothing faster that C and about every new language is=20
> written in it like Ruby, etc, because it the best we have.
Assembly can be faster than C. C/C++ both simply create assembly =
language, hence their speed.
--=20
Derek
©2003 Derek J. Kalweit |
