<s>
Ch	B-Language
is	O
a	O
proprietary	B-Application
cross-platform	B-Operating_System
C	B-Language
and	O
C++	B-Language
interpreter	B-Application
and	O
scripting	O
language	O
environment	O
.	O
</s>
<s>
It	O
was	O
originally	O
designed	O
by	O
Harry	O
H	O
.	O
Cheng	O
as	O
a	O
scripting	O
language	O
for	O
beginners	O
to	O
learn	O
mathematics	O
,	O
computing	O
,	O
numerical	B-General_Concept
analysis	I-General_Concept
(	O
numeric	B-General_Concept
methods	I-General_Concept
)	O
,	O
and	O
programming	O
in	O
C/C	O
++	O
.	O
</s>
<s>
Ch	B-Language
is	O
now	O
developed	O
and	O
marketed	O
by	O
SoftIntegration	O
,	O
Inc	O
,	O
with	O
multiple	O
versions	O
available	O
,	O
including	O
a	O
freely	O
available	O
student	O
edition	O
and	O
Ch	B-Language
Professional	O
Edition	O
for	O
Raspberry	O
Pi	O
is	O
free	O
for	O
non-commercial	O
use	O
.	O
</s>
<s>
Ch	B-Language
can	O
be	O
embedded	O
in	O
C/C	O
++	O
application	O
programs	O
.	O
</s>
<s>
It	O
has	O
numerical	B-General_Concept
computing	I-General_Concept
and	O
graphical	O
plotting	O
features	O
.	O
</s>
<s>
Ch	B-Language
is	O
a	O
combined	O
shell	O
and	O
IDE	O
.	O
</s>
<s>
Ch	B-Language
shell	O
combines	O
the	O
features	O
of	O
common	O
shell	O
and	O
C	B-Language
language	I-Language
.	O
</s>
<s>
It	O
is	O
based	O
on	O
embedded	O
Ch	B-Language
,	O
Scite	O
and	O
Scintilla	O
.	O
</s>
<s>
Ch	B-Language
is	O
written	O
in	O
C	B-Language
and	O
runs	O
on	O
Windows	B-Application
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
FreeBSD	B-Operating_System
,	O
AIX	B-Application
,	O
Solaris	B-Application
,	O
QNX	B-Operating_System
,	O
and	O
HP-UX	B-Application
.	O
</s>
<s>
It	O
supports	O
C90	O
and	O
major	O
C99	B-Language
features	O
,	O
but	O
it	O
does	O
not	O
support	O
the	O
full	O
set	O
of	O
C++	B-Language
features	O
.	O
</s>
<s>
C99	B-Language
complex	O
number	O
,	O
IEEE-754	O
floating-point	O
arithmetic	O
,	O
and	O
variable-length	B-Data_Structure
array	I-Data_Structure
features	O
were	O
supported	O
in	O
Ch	B-Language
before	O
they	O
became	O
part	O
of	O
the	O
C99	B-Language
standard	I-Language
.	O
</s>
<s>
An	O
article	O
published	O
by	O
Computer	O
Reseller	O
News	O
(	O
CRN	O
)	O
named	O
Ch	B-Language
as	O
notable	O
among	O
C-based	O
virtual	O
machines	O
for	O
its	O
functionality	O
and	O
the	O
availability	O
of	O
third-party	O
libraries	O
.	O
</s>
<s>
Ch	B-Language
has	O
many	O
tool	O
kits	O
that	O
extend	O
its	O
functions	O
.	O
</s>
<s>
For	O
example	O
,	O
Ch	B-Language
Mechanism	O
Toolkit	O
is	O
used	O
for	O
design	O
and	O
analysis	O
of	O
commonly	O
used	O
mechanisms	O
such	O
as	O
four-bar	O
linkage	O
,	O
five-bar	O
linkage	O
,	O
six-bar	O
linkage	O
,	O
crank-slider	O
mechanism	O
,	O
and	O
cam-follower	O
system	O
.	O
</s>
<s>
Ch	B-Language
Control	O
System	O
Toolkit	O
is	O
used	O
for	O
modeling	O
,	O
design	O
,	O
and	O
analysis	O
of	O
continuous-time	O
or	O
discrete-time	O
linear	O
time	O
invariant	O
(	O
LTI	O
)	O
control	O
systems	O
.	O
</s>
<s>
Ch	B-Language
is	O
now	O
used	O
and	O
integrated	O
into	O
the	O
curriculum	O
by	O
many	O
high	O
schools	O
and	O
universities	O
to	O
teach	O
computing	O
and	O
programming	O
in	O
C/C	O
++	O
.	O
</s>
<s>
Ch	B-Language
has	O
been	O
integrated	O
into	O
free	O
C-STEM	O
Studio	O
,	O
a	O
platform	O
for	O
learning	O
computing	O
,	O
science	O
,	O
technology	O
,	O
engineering	O
,	O
and	O
mathematics	O
(	O
C-STEM	O
)	O
with	O
robotics	O
.	O
</s>
<s>
C-STEM	O
Studio	O
is	O
developed	O
by	O
UC	O
Davis	O
Center	O
for	O
Integrated	O
Computing	O
and	O
STEM	O
Education	O
(	O
C-STEM	O
)	O
.	O
</s>
<s>
Ch	B-Language
supports	O
LEGO	O
Mindstorms	O
NXT	O
and	O
EV3	O
,	O
Arduino	O
,	O
Linkbot	O
,	O
Finch	O
Robot	O
,	O
RoboTalk	O
and	O
Raspberry	O
Pi	O
,	O
Pi	O
Zero	O
,	O
and	O
ARM	O
for	O
robot	O
programming	O
and	O
learning	O
.	O
</s>
<s>
It	O
can	O
also	O
be	O
embedded	O
into	O
the	O
LabVIEW	B-Application
system-design	O
platform	O
and	O
development	O
environment	O
.	O
</s>
<s>
Ch	B-Language
supports	O
the	O
1999	B-Language
ISO	I-Language
C	I-Language
Standard	O
(	O
C99	B-Language
)	O
and	O
C++	B-Language
classes	O
.	O
</s>
<s>
It	O
is	O
a	O
superset	O
of	O
C	B-Language
with	O
C++	B-Language
classes	O
.	O
</s>
<s>
Several	O
major	O
features	O
of	O
C99	B-Language
are	O
supported	O
,	O
such	O
as	O
complex	O
numbers	O
,	O
variable	B-Data_Structure
length	I-Data_Structure
arrays	I-Data_Structure
(	O
VLAs	O
)	O
,	O
IEEE-754	O
floating-point	O
arithmetic	O
,	O
and	O
generic	O
mathematical	O
functions	O
.	O
</s>
<s>
C++	B-Language
features	O
available	O
in	O
Ch	B-Language
include	O
:	O
</s>
<s>
Ch	B-Language
supports	O
classes	O
in	O
C++	B-Language
with	O
added	O
abilities	O
,	O
including	O
:	O
</s>
<s>
Ch	B-Language
can	O
interact	O
with	O
existing	O
C/C	O
++	O
libraries	O
and	O
call	O
C/C	O
++	O
functions	O
from	O
Ch	B-Language
script	O
.	O
</s>
<s>
As	O
a	O
C/C	O
++	O
interpreter	B-Application
,	O
Ch	B-Language
can	O
be	O
used	O
as	O
a	O
scripting	O
engine	O
and	O
extension	O
language	O
for	O
applications	O
.	O
</s>
<s>
Pointers	O
to	O
arrays	O
or	O
variables	O
can	O
be	O
passed	O
and	O
shared	O
in	O
both	O
C-compiled	O
and	O
Ch	B-Language
scripting	O
contexts	O
.	O
</s>
<s>
One	O
example	O
of	O
an	O
embedded	O
Ch	B-Language
scripting	O
application	O
is	O
Mobile-C	O
,	O
which	O
has	O
been	O
used	O
for	O
collaborative	O
visualization	O
of	O
distributed	O
mesh	O
model	O
.	O
</s>
<s>
Ch	B-Language
has	O
a	O
built-in	O
string	O
type	O
(	O
string_t	O
)	O
for	O
automatic	O
memory	O
allocation	O
and	O
de-allocation	O
.	O
</s>
<s>
Ch	B-Language
has	O
built-in	O
2D/3D	O
graphical	O
plotting	O
features	O
and	O
computational	O
arrays	O
for	O
numerical	B-General_Concept
computing	I-General_Concept
.	O
</s>
<s>
A	O
2D	O
linear	O
equation	O
of	O
the	O
form	O
b	O
=	O
A*x	O
can	O
be	O
written	O
verbatim	O
in	O
Ch	B-Language
.	O
</s>
