Victor Bazarov wrote:
>>
I want to say, that you can throw away whole C++ stdlib ( and can
start with ugly std::auto_ptr ), but your code will be C++ correct.
C++ is not library.
Learning how to use language without learning good practices of using
the library is like learning to dance without a partner. One should
expect big difficulties in the real world, in a real dance hall.
You setup "good practice" without any provements by your habits only. Today
C++ stdlib is so large, that no need to use it completely. Not each ordinary
man can study any complex library (as C++ stdlib) completely and the
knowledge is no need to him in his practical examples.
I hope you do not mean to learn implementation of the std library as "good
practice"? One can say, that description of interface of any good library
must be enough to use it. Any good library must be understandable "on fly -
read, used and forget". Using any good library must not be obstacle and must
not require special enforces.
I think C++ has a weak point - in C++ is hard to use already defined classes
(and stdlib also) in "on fly" manner, because C++ has no extra information
placed in class declaration for design purpose, to be bridge for design
tools. I think using any library is kind of design work.
I want to write about the weak point (at nearest weeks/months) in my page
http://grizlyk1.narod.ru/cpp_new .
>And the overloaded "operator <<" you really need only for templated
functions, when you do not know what kind of data will be outputed at
each instance or in which stream. Else the "printf" is often better.
Please show me how you can output a class object using printf. I dare
you.
You no need to dare. Originally, we are speaking about data that can be
printed by "printf" (probably we are speaking avout POD data), so you can
"output a class object" exactly as if you write the own "operator <<" for
the class, but instead of writing trivial members into ostream, printf them.
I agree, that printf format string is not easy to learn, but any good
on-line help can help you to write correct format string. In any case, make
formatted output with the help of ostream is not easy also.
>Some programmers rare use iostreams in practical case (and printf
also) beacause in theirs systems console-like stream output is
useless thing in the world.
I am guessing you've not one of those...
It is hard to me to understand your suspicions, but i rare use streams in
practical cases - i have no devices to be able to display the streams or to
get input from them.
--
Maksim A. Polyanin
http://grizlyk1.narod.ru/cpp_new
"In thi world of fairy tales rolls are liked olso"
/Gnume/
