are there any tutorials to help a proficient c++ programmer learn c?

Question

I became a professional programmer in the era of object oriented code, and have years of experience programming in C++. I often work on large projects that have years of legacy code in a mix of c++ and c. I feel less comfortable working on pure c parts of systems. From programming in C++ I understand all the c syntax, but there's a hole in my knowledge about how to organise a complex c program without objects, and what constitutes best practise for managing memory that I would like to fill. I learnt c++ after working as a java programmer, and think a bit more c would make me a better c++ programmer, and a bit less of a java translated into c++ programmer

Answer 1

In terms of organization, looking at the POSIX APIs, especially pthreads will give you a good idea of how to organize C code. The basic rules of good C project organization are:

• Don't expose your structures. Use opaque types only.
• Use the library and data type names as prefixes for function names.
• Provide "create" and "destroy" functions for allocation/construction and destruction/deallocation.
• Pass in the opaque type as the first parameter to functions operating on that type.
• Implement the C APIs using either C or C++ (it's up to you). Obviously, use non-opaque types there.

Answer 2

some google results:

C for C++ programmers

C for C++ programmers 2