Real programs rarely fit into a single source file, and I know you’ve been champing at the bit, eager to explore how C++ works with multiple source files that make up a single program. This Exploration shows you the basics. Advanced techniques, such as shared libraries (DLLs, shared objects, etc.), are beyond the scope of this book and sometimes involve compiler-specific features that extend the language beyond the standard. You have to consult your compiler documentation for details.