C/C++

Coding

• Coding header files
• One-true-brace ident style
• Learn from examples and use coding approaches from third-party software

Commenting

• Place Doxygen comments in header files (before declarations of namespaces/classes/structs/typedefs/macros) and main source files (for documenting tools and tests)
• Use double forward slash for short comments in the code

C++

• Mixing C/C++
• Template C++ is preferrable from the point of view of runtime performance
• Use plain C unless you need flexible data structures or STL/Boost functionality
• Provide main API in C

General

• Don't use non-standard functions, like itoa
• Handling program arguments (avoid argp since it is not supported on many platforms)
• Dynamic loading of shared libraries