howdy,
i am using borland builder 5 to learn C++ in the windoze world, in the book i have it refers to functions that are part of the package but "are not defined by the ANSI/ISO standard", im guessing they are probably specific only to the borland libraries.
are these functions breaking some kind of cardinal rule of C++?
will apps written using these functions work as well as apps written using only ANSI/ISO defined functions?
M.R.
The question is of portability. If you write a program using these implementation dependent libraries then your program will break when you try to compile it on another compiler or system. One of the attributes of C++ is its ability to be ported across many platforms without change, but that's only if you write a program using ISO standard C++.
-Prelude
My best code is written with the delete key.
howdy,
here is one example of what this book says.
does this mean it is an acceptable "style" and that it breaks ANSI/ISO standard rules?You can specify a range inside of a scanset using a hyphen. For example, this tells scanf() to accept the characters "A" through "Z".
%[A-Z]
The use of the hyphen to describe a range is not defined by the ANSI/ISO C standard. However,it is nearly universally accepted.
M.R.
That range flag for scanf is implemented on many compilers, but not all. That's what they mean. A standard construct is guaranteed to be available everywhere that C++ is supported.
-Prelude
My best code is written with the delete key.
