Major Features and Comparison of Different Ch Editions
Features Ch Standard Ch Professional
  Ch Student
ISO C90 Standard X X
Wide characters in Addendum 1 for C90 X X
Complex numbers in C99 X X
Variable length arrays (VLAs) in C99 X X
IEEE floating-point arithmetic in C99 X X
Type generic functions in C99 X X
long long data type in C99 X X
Many other new features in C99 X X
Classes and other features in C++ X X
Complex IEEE floating-point arithmetic X X
Assumed-shape arrays X X
Nested functions X X
Interactive C statement execution X X
Interactive command shell X X
Shell programming X X
Safe Ch X X
Ch applets X X
String type X X
Adjustable array bounds X X
Socket/Winsock X X
Ch SDK to interface binary C/C++ code X X
POSIX X X
Unix utilities such as vi, ls, grep for Windows X X
OpenGL toolkit X X
GTK+ toolkit X X
X/Motif toolkit on Unix/Linux X X
Windows toolkit on Windows X X
Support Common Gateway Interface (CGI) X X
Support third party software such as ODBC and NI-DAQ X X
Soft Copies of Ch Users's Guide, ChIDE User's Guide,
Ch Reference Guide, and Ch SDK User's Guide		 X X
Multiple users on a single machine X X
Ch Integrated Development Environment (ChIDE)   X
Computational array   X
2D/3D graphical plotting   X
Advanced numerical analysis functions   X
QuickAnimation™ for quick animation   X
All functions in C LAPACK   X
Support all toolkits and packages   X

Note: Ch Student Edition is the same as Ch Professional Edition with the following restrictions:

  1. A plot generated by Ch Student Edition will display "This plot is generated by Ch Student Edition" in the x-label in a separate line.
  2. The font size in ChIDE cannot be changed to more than 10.
  3. The total number of elements of an array is limited to 20,000.
  4. It is availale for Windows (32 and 64 bits), Linux (32 and 64 bits), and Mac OS X x86 (32 bits) only.
  5. It is for a single user on a single machine.
  6. To qualify for Ch Student Edition, you must be a registered student of an educational institution (K-12, junior college, college). The product must be restricted to use in conjunction with classes in an institution.
  7. Ch Student Edition is free for registered students in educational institutions (K-12, junior college, college).
  8. It can be downloaded here.

Ch Professional Edition will expire in 30 days after installation if there is no valid license. A plot generated by Ch Professional Edition during the first 30 days evaluation displays "This plot is generated by Ch Evaluation Edition" in the x-label in a separate line.