Ch (computer programming)

<h2 id="features">Features</h2>
CH supports the 1999 ISO C Standard (C99) and C++ classes. It is a superset of C with C++ classes. Several major features of C99 are supported, such as complex numbers, <a href="/facts/Variable-length_array/eYknlUTc">variable length arrays</a> (VLAs), IEEE 754 floating-point arithmetic, and generic mathematical functions. The specification for wide characters in Addendum 1 for C90 is also supported.
C++ features available in CH include:

<ul><li><a href="/facts/Member_function/8kAXxVYs">Member functions</a></li>
<li>Mixed code and declaration</li>
<li>The <a href="/facts/This_(computer_programming)/DYW7Snl3">this</a> -> pointer</li>
<li><a href="/facts/Reference_type_(C%252B%252B)/x0JKew2U">Reference type and pass-by-reference</a></li>
<li>Function-style type conversion</li>
<li><a href="/facts/Classes_in_C%252B%252B/1rWoasWM">Classes</a></li>
<li>Private/public data and functions in classes. Ch is compatible with C++ in that by default, members of a class definition are assumed to be private until a 'public' declaration is given</li>
<li>Static member of class/struct/union</li>
<li>Const member functions</li>
<li>The new and delete operators</li>
<li>Constructors and destructors</li>
<li><a href="/facts/Polymorphic_function/S3cCKsVT">Polymorphic functions</a></li>
<li>The <a href="/facts/Scope_resolution_operator/fNr6x1o4">scope resolution operator</a></li>
<li>The I/O functions cout, cerr, and cin with endl</li>
<li>Arguments for <a href="/facts/Variadic_function/XjW6Nbsw">variadic functions</a> are optional</li></ul>
CH supports classes in C++ with added abilities, including:

<ul><li>Classes inside member functions</li>
<li><a href="/facts/Nested_function/Rw2xzMLP">Nested functions</a> with classes</li>
<li>Passing member function to argument of pointer-to-function type of functions</li></ul>
CH can interact with existing C/C++ libraries and call C/C++ functions from CH script.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>
As a C/C++ interpreter, CH can be used as a scripting engine and extension language for applications. Pointers to arrays or variables can be passed and shared in both C-compiled and CH scripting contexts. One example of an embedded CH scripting application is Mobile-C, which has been used for collaborative visualization of distributed mesh model.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a><a class="footnote-ref" id="fnref:18" href="#fn:18">18</a><a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>
CH has a built-in <a href="/facts/String_type/4ChJu5WS">string type</a> (string_t) for automatic memory allocation and de-allocation. It supports shell aliases, history, and piping.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a><a class="footnote-ref" id="fnref:21" href="#fn:21">21</a>
CH has built-in 2D/3D graphical plotting features and computational <a href="/facts/Array_data_type/gHJJ3XPw">arrays</a> for numerical computing. A 2D <a href="/facts/Linear_equation/JfCgALwf">linear equation</a> of the form b = A*x can be written verbatim in Ch.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/CINT/fsr2FhjG">CINT</a></li>
<li><a href="/facts/Pike_(programming_language)/F6nLmX47">Pike (programming language)</a></li></ul>

<h2 id="further-reading">Further reading</h2>
<ul><li>Heller, Martin (2001). <a href="https://web.archive.org/web/20011116220556/http://www.byte.com/documents/s%3D1776/byt20011031s0002/1105_heller.html">"The Ch Language Environment"</a>. <a href="/facts/Byte_(magazine)/xWovF95Q">Byte</a>. Archived from <a href="http://www.byte.com/documents/s=1776/byt20011031s0002/1105_heller.html">the original</a> on November 16, 2001. {{cite journal}}: Cite journal requires |journal= (help)</li>
<li>Cheng, Harry (2002). <a href="http://drdobbs.com/cpp/184404993">"C99 & Numeric Computing"</a>. Dr. Dobb's Journal. pp. 28–34.</li>
<li>Cheng, Harry (2006). <a href="http://drdobbs.com/184402054">"Ch: A C/C++ Interpreter for Script Computing"</a>. Dr. Dobb's Journal. pp. 6–12.</li>
<li>Cheng, Harry (2009). <a href="http://highered.mcgraw-hill.com/sites/0073376051/">C For Engineers & Scientists, An Interpretive Approach</a>. McGraw-Hill. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-07-729046-7.</li>
<li>Cheng, Harry (2011). <a href="https://www.amazon.cn/C%E8%AF%AD%E8%A8%80%E7%A8%8B%E5%BA%8F%E8%AE%BE%E8%AE%A1%E6%95%99%E7%A8%8B-%E7%A8%8B%E8%BE%89/dp/B005JR8IW6/ref=sr_1_1?s=books&ie=UTF8&qid=1325463722&sr=1-1">C For Engineers & Scientists</a> (Chinese ed.). Higher Education Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-07-729046-7.</li></ul>
<h2 id="external-links">External links</h2>
<ul><li><a href="http://www.softintegration.com">Official website</a>, SoftIntegration</li>
<li><a href="http://www.mobilec.org/">Mobile-C: a Multi-Agent Platform for Mobile C/C++ Agents Home Page</a></li>
<li><a href="http://c-stem.ucdavis.edu/studio/">C-STEM Studio</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Veeraraghavan, Sriranga (2013). "An introduction to Ch: Implementing a temperature converter in Ch". ComputerWorld. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://www.techworld.com.au/article/452524/an_introduction_ch_implementing_temperature_converter_ch/" target="_blank">http://www.techworld.com.au/article/452524/an_introduction_ch_implementing_temperature_converter_ch/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Ch Shell <a href="http://www.softintegration.com/docs/ch/shell/" target="_blank">http://www.softintegration.com/docs/ch/shell/</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Ch IDE <a href="http://www.softintegration.com/docs/ch/chide/" target="_blank">http://www.softintegration.com/docs/ch/chide/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Wang, Gary (2002). "Ch Solves Portability Headaches". IEEE Spectrum. 39 (6): 59. doi:10.1109/MSPEC.2002.1049264. S2CID 32477309. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Cheng, Harry (1993). "Handling of Complex Numbers in the Ch Programming Language". Scientific Programming: 76–106. <a href="http://iospress.metapress.com/content/xml874m51x1w42w0/" target="_blank">http://iospress.metapress.com/content/xml874m51x1w42w0/</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Cheng, Harry (1993). "Scientific Computing in the Ch Programming Language". Scientific Programming: 49–75. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://iospress.metapress.com/content/f225771541203807/" target="_blank">http://iospress.metapress.com/content/f225771541203807/</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Cheng, Harry (1995). "Extending C and FORTRAN for Design Automation". ASME Trans., Journal of Mechanical Design: 390–395. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JMDEDB000117000003000390000001&idtype=cvips&gifs=yes&ref=no" target="_blank">http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JMDEDB000117000003000390000001&idtype=cvips&gifs=yes&ref=no</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Cheng, Harry (1995). "Extending C with arrays of variable length". Computer Standards & Interfaces. 17 (4): 375–406. doi:10.1016/0920-5489(95)00007-H.[dead link] <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Morejon, Mario (2006). "Ch Language Rivals Java Functionality". CRN. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://www.crn.com/reviews/applications-os/175804126/ch-language-rivals-java-functionality.htm" target="_blank">http://www.crn.com/reviews/applications-os/175804126/ch-language-rivals-java-functionality.htm</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Cheng, Harry (2006). "Object-Oriented Interactive Mechanism Design and Analysis". Engineering with Computers. 21 (3): 237–246. doi:10.1007/s00366-005-0008-4. S2CID 16996625. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Zhu, Yong (2003). "An Object-Based Software Package for Interactive Control System Design and Analysis". Journal of Computing and Information Science in Engineering. 3 (4): 366–367. doi:10.1115/1.1630815. S2CID 17908643. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">ch robot <a href="http://www.newtonium.com/public_html/Products/RoboWorks/chrobotalk.htm" target="_blank">http://www.newtonium.com/public_html/Products/RoboWorks/chrobotalk.htm</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">ch finch <a href="http://www.finchrobot.com/software/ch" target="_blank">http://www.finchrobot.com/software/ch</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">ch raspberry and arm[permanent dead link] <a href="http://www.softintegration.com/company/press/ch_arm_raspberry_pi_released.htm" target="_blank">http://www.softintegration.com/company/press/ch_arm_raspberry_pi_released.htm</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">"Embedding a C/C++ Interpreter Ch into LabVIEW for Scripting". <a href="http://iel.ucdavis.edu/projects/chlabview/" target="_blank">http://iel.ucdavis.edu/projects/chlabview/</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Wilson, Matthew (2004). "Open-RJ and Ch". Dr. Dobb's Journal. <a href="http://drdobbs.com/184401877?queryText=ChSDK" target="_blank">http://drdobbs.com/184401877?queryText=ChSDK</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Cheng, Harry (2009). "Speeding-Up Software Development Using Embedded Scripting". Dr. Dobb's Journal. p. 8. <a href="http://drdobbs.com/architecture-and-design/212201774" target="_blank">http://drdobbs.com/architecture-and-design/212201774</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Wang, Li-rong; Bo, Yo; Hagiwara, I (2009). 2009 IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design. Computer-Aided Industrial Design & Conceptual Design, 2009. CAID & CD 2009. IEEE 10th International Conference. pp. 1127–1132. doi:10.1109/CAIDCD.2009.5375178. ISBN 978-1-4244-5266-8. S2CID 39307433. <a href="978-1-4244-5266-8" target="_blank">978-1-4244-5266-8</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Wang, Li-rong; Bo, Yo; Hagiwara, Ichiro (2009). An agent based collaborative simplification of 3D mesh model. Cdve'09. CDVE'09 Proceedings of the 6th international conference on cooperative design, visualization, and engineering. pp. 325–328. ISBN 9783642042645. <a href="9783642042645" target="_blank">9783642042645</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Campbell, Matt (2003). "Ch, A C/C++ Interpreter – New possibilities for people who like C and Unix". MACTECH, the journal of Apple technology. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://www.mactech.com/articles/mactech/Vol.19/19.09/CInterpreter/index.html" target="_blank">http://www.mactech.com/articles/mactech/Vol.19/19.09/CInterpreter/index.html</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Cheng, Harry (2010). The Ch Language Environment (6.3 ed.). Davis, CA: SoftIntegration, Inc. <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Glassborow, Francis (2001). "The Ch Language Environment Version 2.0". C Vu Magazine: 36–37. {{cite journal}}: Cite journal requires |journal= (help) <a href="http://www.softintegration.com/company/pub/accu.html" target="_blank">http://www.softintegration.com/company/pub/accu.html</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
</ol>

Ch (computer programming) open-in-new

Ch (computer programming)