[Techtalk] simple reference book on C++/ was [Techtalk] sim

[Kathryn Hogg]

One thing you need to be careful of is whether your compiler/environment is
using pre-ISO C++ commonly called ARM C++.  ARM stands for "Annotated
Reference Manual" by Bjarne Stroustrap which served as the language
reference for many years.

One of the major changes in arm vs iso c++ is the iostreams library.  For
example,  in the arm world you would have

include <iostream.h>

int main(int, char **)
{
cout << "hello world!" << endl
return 0;
}

and with std iostreams, you have

include <iostream>
us#if __cplusplus >= 199707Ling std::cout;

int main(int, char **)
{
cout << "hello world!" << endl
return 0;
}

Since we are linuxchix, I'm assuming that you are compiling with gcc. What
version do you have?

$ gcc --version
3.0.3

gcc has been catching up to the iso standard and 3.0.2 and up do a pretty
good job and support the standard iostreams.  You woukd compile the above
program (assuming it is in hello.C) as

$ g++ -o hello hello.C

if you aren't sure if your compiler is std c++ compliant, tweak the code a
little:

#if __cplusplus >= 199707L
#define HAS_STD_CXX 1
#else
#define HAS_STD_CXX 0
#endif

#if HAS_STD_CXX
#include <iostream>
using std::cxx;
#else
#include <iostream.h>
#endif

int main(int, char **)
{
cout << "hello world" << endl;
return 0;
}


--
Kathryn