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Ch (computer programming)

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In computing, Ch (/[invalid input: 'icon']ˌsiːˈeɪtʃ/) is a proprietary cross-platform C and C++ interpreter originally designed by Harry H. Cheng as a scripting language for beginners to learn math, computing, numerics, and programming in C/C++. Ch is now developed and marketed by SoftIntegration, Inc. A student edition is freely available.

Ch is written in C and runs under Microsoft Windows, Linux, Mac OS X, FreeBSD, AIX, Solaris, QNX and HP-UX. It supports C90 and major C99 features, but it does not support the full set of C++ features. C99 complex number, IEEE-754 floating-point arithmetic, and VLA features were supported in Ch before they became part of the C99 standard.[1][2][3][4] An article published by CRN named Ch as notable among C-based virtual machines for its functionality and the availability of third-party libraries.[5]

Ch is now used and integrated into curriculum by many universities and schools[dubious – discuss] for learning computing and programming in C/C++.[6][7][8][9][10][11]

Ch can also be run as an interactive shell to execute C statements and scripts, Unix commands in Unix environments, and Windows commands under Windows environments.[12]

Features

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, variable length arrays (VLAs), IEEE-754 floating-point arithmetic and generic mathematical functions. The specification for wide characters in Addendum 1 for C90 is also supported.

The following C++ features are available in Ch:

  • Member functions
  • Mixed code and declaration
  • The this-> pointer
  • Reference type and pass-by-reference
  • Function-style type conversion
  • Classes
  • 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
  • Static member of class/struct/union
  • Const member functions
  • The new and delete operators
  • Constructors and destructors
  • Polymorphic functions
  • The scope resolution operator ::
  • The I/O functions cout, cerr, and cin with endl
  • Arguments for variadic functions are optional

Ch supports classes in C++ with the following additional capabilities:

  • Classes inside member functions
  • Nested functions with classes
  • Passing member function to argument of pointer-to-function type of functions

Ch can interface with existing C/C++ libraries and call C/C++ functions from Ch script.[13] 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.[14][15] [16]

Ch has a built-in string type (string_t) for automatic memory allocation and de-allocation. It supports shell aliases, history, piping, etc.[17][18]

Ch has built-in 2D/3D graphical plotting features and computational arrays for numerical computing. A 2D linear equation of the form b = A*x can be written verbatim in Ch.[19]

See also

References

  1. ^ Cheng, Harry (1993). "Handling of Complex Numbers in the Ch Programming Language". Scientific Programming: 76–106.
  2. ^ Cheng, Harry (1993). "Scientific Computing in the Ch Programming Language". Scientific Programming: 49–75. {{cite journal}}: Cite journal requires |journal= (help)
  3. ^ 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)
  4. ^ Cheng, Harry (1995). "Extending C with arrays of variable length". Computer Standards & Interfaces: 375–406. doi:10.1016/0920-5489(95)00007-H. {{cite journal}}: Cite journal requires |journal= (help)
  5. ^ Morejon, Mario (2006). "Ch Language Rivals Java Functionality". CRN. {{cite journal}}: Cite journal requires |journal= (help)
  6. ^ Cheng, Harry (2009). "C for the Course". ASME Mechanical Engineering Magazine: 50–52. {{cite journal}}: Cite journal requires |journal= (help)
  7. ^ Huber, Tom (2010). "An Introduction to C and Ch: Your One-Stop Shop for Scientific Computing". IEEE Computing in Science and Engineering. doi:10.1109/MCSE.2010.82. {{cite journal}}: Cite journal requires |journal= (help)
  8. ^ Liu, Li; Wang, Zhaoqing; Jiang, Xusheng (2010). "Anchor-based programming teaching embedded with Ch platform". Mechatronics and Embedded Systems and Applications (MESA), IEEE/ASME International Conference: 49–52. {{cite journal}}: Cite journal requires |journal= (help)
  9. ^ Furman, B.; Wertz, E. (2010). "A first course in computer programming for mechanical engineers". Mechatronics and Embedded Systems and Applications (MESA), IEEE/ASME International Conference: 70–75. {{cite journal}}: Cite journal requires |journal= (help)
  10. ^ ZHUANG, Hong; WANG, Zhao-qing (2009). "Experience of Using Ch for Teaching Computer Programming in C". Computer Education: TP311.11–4. Template:CNKI. {{cite journal}}: Cite journal requires |journal= (help)
  11. ^ WANG, RONG (2009). "Study of C Language Programming Teaching Method on platform Ch". Journal of Weinan Teachers University: TP312.1–4. Template:CNKI. {{cite journal}}: Cite journal requires |journal= (help)
  12. ^ Wang, Gary (2002). "Ch Solves Portability Headaches". IEEE Spectrum. {{cite journal}}: Cite journal requires |journal= (help)
  13. ^ Wilson, Matthew (2004). "Open-RJ and Ch". Dr. Dobb's Journal. {{cite journal}}: Cite journal requires |journal= (help)
  14. ^ Cheng, Harry (2009). "Speeding-Up Software Development Using Embedded Scripting". Dr. Dobb's Journal: 8–8. {{cite journal}}: Cite journal requires |journal= (help)
  15. ^ Wang, Li-rong; Bo, Yo; Hagiwara, I. "Mobile-C based agent management for collaborative visualization of distributed mesh model". Computer-Aided Industrial Design & Conceptual Design, 2009. CAID & CD 2009. IEEE 10th International Conference. {{cite journal}}: Cite journal requires |journal= (help)
  16. ^ Wang, Li-rong; Bo, Yo; Hagiwara, Ichiro (2009). "An agent based collaborative simplification of 3D mesh model". CDVE'09 Proceedings of the 6th international conference on cooperative design, visualization, and engineering. {{cite journal}}: Cite journal requires |journal= (help)
  17. ^ 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)
  18. ^ Cheng, Harry (2010). The Ch Language Environment (6.3 ed.). Davis, CA: SoftIntegration , Inc.
  19. ^ Glassborow, Francis (2001). "The Ch Language Environment Version 2.0". C Vu Magazine: 36–37. {{cite journal}}: Cite journal requires |journal= (help)

Further reading

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