just buy a book. nothing teahces you more thoroughly. In the beginning search for books with topics like introduction to C/C++. Programming with C/C++ e.t.c. After these you can go to more complex which deal with particular environments e.g C/C++ for UNIX, Data structures and programming with C/C++ e.t.c However, don't go for the very catchy ones like C++ in 21 days or C/C++ Now!
NB The bolded titles are the ones I used.