C Programming/Mixing languages

Assembler
See Embedded Systems/Mixed C and Assembly Programming

Cg
Make the main program (for CPU) in C, which loads and run the Cg program ( for GPU ).

Header files
Add to C program:

Minimal program

 * by bobobobo

Java
Using the Java native interface (JNI), Java applications can call C libraries.

See also
 * Java_Programming/Keywords/native

Perl
To mix Perl and C, we can use XS. XS is an interface description file format used to create an extension interface between Perl and C code (or a C library) which one wishes to use with Perl.

The basic procedure is very simple. We can create the necessary subdirectory structure by running "h2xs" application (e.g. "h2xs -A -n Modulename"). This will create - among others - a Makefile.PL, a .pm Perl module and a .xs XSUB file in the subdirectory tree. We can edit the .xs file by adding our code to that, let's say: void hello CODE: printf("Hello, world!\n"); and we can successfully use our new command at Perl side, after running a "perl Makefile.PL" and "make".

Further details can be found on the perlxstut perldoc page.

Python
Here can be found some details about extending Python with modules written in C. You might read about Cython and Pyrex as well, that makes easier to create modules in C, translating a Python-like code into C.

Using the Python ctypes module, one can write C code directly into Python.