Ch (computer programming)
Ch, pronounced as C H, is an embeddable C/C++ interpreter. Ch is designed for using one C compatible language for all programming tasks.
Ch programming language extends C and C++ for scripting, numerical computing and 2D/3D plottings and embedded scripting. It can run in Windows, Linux x86, Linux PPC, Solaris, HP-UX, Mac OS X, FreeBSD and QNX.
Features
C/C++ compatible interpreter
Ch supports 1999 ISO C Standard (C99) and C++ classes. It is superset of C with C++ class. C99 major features such as complex numbers, variable length arrays (VLAs), IEEE-754 floating-point arithmetic, generic mathematical functions in C99 are suppported. Wide characters in Addendum 1 for C90 is also supported.
Embeddable scripting
As a C/C++ interpreter, Ch can be used as a scripting engine for your applications. It extends your applications with C compatible scripting language.
Shell programming and cross-platform scripting
Ch is a C-compatible shell similar as C-shell (csh). It can be used as login shell as well. Ch has a built-in string type for auto memory allocation and de-allocation. It makes scripting easier.
2D/3D plotting and numerical computing
Ch has built-in 2D/3D graphical plotting features and computational arrays for numerical computing. Linear system equation b = A*x can be written verbatim in Ch.
Examples
"Hello, world!" in Ch
There are two ways to run Ch code. One is:
#!/bin/ch
printf("Hello world!\n");
Another is:
#!/bin/ch
#include <stdio.h>
int main() {
printf("Hello world!\n");
}
Note: #!/bin/ch is optional.
Numerical computing in Ch
#include <stdio.h>
#include <array.h>
int main() {
array double A[2][3] = {1, 2, 3,
4, 5, 6};
array double B[3][2];
printf("A= \n%f \n", A+A);
B = 2*transpose(A);
printf("B= \n%f \n", B);
}
The output is:
A= 2.000000 4.000000 6.000000 8.000000 10.000000 12.000000 B= 2.000000 8.000000 4.000000 10.000000 6.000000 12.000000
Shell programming
Find and compile all .c files into .o in the current directory when the .o is old or absent.
#!/bin/ch
#include <sys/stat.h>
struct stat cstat, ostat;
string_t c, o;
foreach (c; `find . -name "*.c"`)
{
o=`echo $c | sed 's/.c$/.o/'`;
stat(o, &ostat); stat(c, &cstat);
if (ostat.st_mtime > cstat.st_mtime)
{
echo "compiling $c to $o";
gcc -c -o "$o" "$c";
}
}