What type of programs are C/C++ used for now? [duplicate]

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in which area is c++ mostly used?

I started off with C in school, went to Java and now I primarily use the P's(Php, Perl, Python) so my exposure to the lower level languages have all but disappeared. I would like to get back into it but I can never justify using C over Perl or Python. What real-world apps are being built with these langu开发者_如何转开发ages? Any suggestions if I want to dive back in, what can I do with C/C++ that I can't easily do with Perl/Python?

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To borrow some text from the answer I had for another related question:

1. Device drivers in native code.
2. High performance floating point number crunching (i.e. SIMD).
3. Easy ability to interface with assembly language routines.
4. Manage memory manually for extended execution runs.

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Most of my work has been C and C++. I studied computer engineering in school and worked with embedded devices. My Master's degree had an emphasis in graphics and visualization. One of our visualization apps was written in Python, but for the most part, graphics demands C/C++ for the speed. I now work with embedded devices running Windows Mobile and Windows CE - all C++, though you can do a lot with C#. I previously worked in simulations, which was all C++ code on the backend. C++ is still king for time-sensitive IO, embedded applications, graphics and simulations.

Basically, if you need tight control of timing, you go lower level. Or if you need light-weight (ie, small program size, small memory footprint)

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Somewhat unscientifically I took a look on Sourceforge and the top twenty projects/language break-down is currently thus:

• Java(43,199)
• C++(34,313)
• PHP(28,333)
• C(26,711)
• C#(12,298)
• Python(12,222)
• JavaScript(10,307)
• Perl(8,931)
• Unix Shell(3,618)
• Delphi/Kylix(3,353)
• Visual Basic(3,044)
• Visual Basic .NET(2,513)
• Assembly(2,283)
• JSP(1,891)
• Ruby(1,731)
• PL/SQL(1,669)
• Objective C(1,424)
• ASP.NET(1,344)
• Tcl(1,241)
• ActionScript(1,164)

Perl + Python together still total less than C alone. I have no idea why Java is so high, I know of no single Java developer and have not seen a single Java project, but I am sure someone is using it! For probably the same reason, you are not seeing much C/C++, you are just not working in a domain where it figures highly. I work in embedded systems where C and C++ are ubiquitous and Python comes nowhere. Different languages are encountered to different extents in different worlds.

You ask what you can do with C/C++ that you cannot do easily with Perl/Python; well the answer is plenty, real-time embedded systems for one; but if that is not what you want/need to do, then there is no reason to. On the other hand I might ask the reverse; I'd use C++ for things you might use Python for, simply because for me it would be easier and quicker (than learning a new language and getting the tools working)

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C/C++ can be, and is, used for nearly all "types" of programs.

There are some major advantages to C and C++:

• Potentially better performance
• Easier to build interoperable libraries, especially if working with libraries usable from multiple languages.

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well the interpreters for your "P's" languages are most certainly written in c/c++. Most OS code is written in C/C++. On the application side, if you are into games, they are generally written in c/c++. Anything that needs high performance and or low memory is a good candidate.

I've used Gsoap, a c++ soap client implementation for a web service that got HUGE traffic.

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Most desktop/console applications with a bias toward graphics rely heavily on C++. This includes CAD software and AAA video games, among other things.