The Wolfram Language supports several levels of interfacing to C and C++ programs. You can call functions from C-compatible libraries directly from Wolfram Language. You can compile Wolfram Language code that calls C-compatible libraries into native machine code. You can create "installable" C programs where C functions are directly connected to Wolfram Language functions. You can use C to call the Wolfram Language through the Wolfram Symbolic Transfer Protocol (WSTP) and get full access to its capabilities. And you can create C program fragments and modify C source code.

Foreign Function Interface »

ForeignFunctionLoad — load a function from a C-compatible dynamic library

ForeignFunction — a function that calls into a C-compatible dynamic library

RawMemoryAllocate   ▪ RawMemoryRead   ▪ RawMemoryWrite   ▪ RawMemoryImport   ▪ RawMemoryExport   ▪ RawPointer   ▪ ...

Wolfram Compiler »

FunctionCompile — create a compiled version of a function

FunctionCompileExportLibrary — create a shared library by compiling a function

FunctionDeclaration — an auxiliary function declaration to use in compilation

LibraryFunctionDeclaration — an auxiliary declaration of a library function to use in compilation

FunctionCompileExport   ▪ FunctionCompileExportString   ▪ FunctionCompileExportByteArray   ▪ CreateCompilerEnvironment   ▪ ...

Calling C Programs from the Wolfram Language »

Install — load an installable WSTP program

.tm — template file for connecting C and Wolfram Language functions

mcc , mprep — scripts for building WSTP programs

WSEvaluate() — call back into the Wolfram Language

Calling the Wolfram Language from C Programs »

WSPutInteger32()   ▪ WSGetInteger32()   ▪ WSPutString()   ▪ WSPutFunction()   ▪ ...

WSOpenString()   ▪ WSNextPacket()   ▪ WSReady()   ▪ ...

Wolfram LibraryLink »

LibraryFunctionLoad — load a function from a dynamic library into the Wolfram System

LibraryFunction — a function that calls into a dynamic library

LibraryFunctionInformation   ▪ LibraryFunctionUnload   ▪ LibraryLoad   ▪ LibraryUnload   ▪ FindLibrary   ▪ $LibraryPath   ▪ ...

Calling C Compilers from the Wolfram Language »

CreateExecutable — create an executable from C code

CreateLibrary — create a library from C code

Generating C Code »

Export — export a Wolfram Language compiled function into C code

CCodeGenerate — export a Wolfram Language compiled function into C code

CCodeStringGenerate   ▪ SymbolicCGenerate   ▪ LibraryGenerate

CForm — convert an expression to C language form

Symbolic Representation of C Code »

CFunction — symbolic representation of a C function

CCall — symbolic representation of a C function call

CAddress   ▪ CAssign   ▪ CBlock   ▪ CDeclare   ▪ CIf   ▪ CPointerType   ▪ CStruct