g++ and gcc , cant find libraries

[lordbux]

That's a pretty big problem. Have you installed the build-essential package?

It seems build-essential was not installed , but still i am having the trouble like.

In file included from /usr/include/c++/4.3/bits/postypes.h:47,
                 from /usr/include/c++/4.3/iosfwd:47,
                 from /usr/include/c++/4.3/ios:44,
                 from /usr/include/c++/4.3/istream:45,
                 from /usr/include/c++/4.3/fstream:45,
                 from libvistax.h:5:

libvistax.h: In function ‘int passw(char*)’:
libvistax.h:24: error: ‘strcpy’ was not declared in this scope
libvistax.h: In function ‘int wtest(char*)’:
libvistax.h:35: error: ‘strcpy’ was not declared in this scope
libvistax.h:36: error: ‘ofstream’ was not declared in this scope
libvistax.h:36: error: expected ‘;’ before ‘tet’
libvistax.h:37: error: ‘strcat’ was not declared in this scope
libvistax.h:38: error: ‘tet’ was not declared in this scope
libvistax.h:45: error: ‘system’ was not declared in this scope
libvistax.h:49: error: ‘cout’ was not declared in this scope
libvistax.h: In function ‘void alcen(char*)’:
libvistax.h:56: error: ‘strlen’ was not declared in this scope
libvistax.h:57: error: ‘cout’ was not declared in this scope
libvistax.h:58: error: ‘cout’ was not declared in this scope
libvistax.h: In function ‘int random(int)’:


and lot more..till end

[pedro_orange]

Have you included the correct header files?
Also, have you included the std namespace?

using namespace std;

[lordbux]

using "name space std" solved that problem

thank you everyone BUT i am having a new trouble,

i am using netbeans IDE and it is giving an error that

fstream, iostream, stdio.h, unistd

have unresolved includes in them, ..what should i do.

is there somehow i can get the old original iosteam.h , fstream.h and other binaries
the new set is just a mess.

Please help. Thanks in advance

[stderr]

Indeed, it was never going to work without using namespace std or a std:: prefix. You need to remember that in C++, functions are called relative to a namespace.

I would personally recommend when you're starting out programming cpp that you start on the command line - this way you can much more easily grasp the basic concepts. When you can code simple programs straight, write the compilation commands, etc, then you've got a solid starting point to move to a GUI-based IDE. IDEs, in my experience, tend to make large projects slightly more manageable, and small projects longer & harder. Anyway...

Unresolved includes probably means your header paths are set incorrectly - in your case, in the NetBeans IDE preferences.

[lordbux]

Indeed, it was never going to work without using namespace std or a std:: prefix. You need to remember that in C++, functions are called relative to a namespace.

I would personally recommend when you're starting out programming cpp that you start on the command line - this way you can much more easily grasp the basic concepts. When you can code simple programs straight, write the compilation commands, etc, then you've got a solid starting point to move to a GUI-based IDE. IDEs, in my experience, tend to make large projects slightly more manageable, and small projects longer & harder. Anyway...

Unresolved includes probably means your header paths are set incorrectly - in your case, in the NetBeans IDE preferences.

I have been working on cpp for the last 5 years.
and i made a switch to gcc and g++ only 2 years back.
till then i used to use Turbo C++.
and everything was fine first , then suddenly with an update, my compilers went absolutely mad, the iostream.h and fstream.h everything became iostream fstream ..etc. the till then i could do without "namespace std". and now it wont do without it.

and the file.eof() function just vanished, it says there nothing exist calls eof.
I am in middle of a important projecta nd it seems i have to rewrite the entire 80,000 lines of code again. to adjust to the new changes which i don't understand the reason for.

+ i am getting many unresolved dependencies from header files. it seems includes inside the header files are too missing.

is there any way i can get my old compiler and libraries back.

[stderr]

Hmm, considering that I think we need to know more about what changed on your system to cause you all these problems.

Can you crosscheck your recently updated/changed package list against the date/time you first started experiencing these problems?

System->Admin->Synaptic, File->History.

Also can you post the output of

ls -l $(whereis g++ | awk '{ print $2 }')

and

sudo dpkg -l libstdc++*

edit: I would add that the behavior you're now experiencing is what I've been used to for years, and that it's been my understanding that references such as <iostream.h> have been deprecated for many years, due to the introduction of namespaces. So I'm pretty interested to see what you have been using and what's happened... maybe such things have still been supported as deprecated for ages and now with g++ 4.4 they've finally removed support - don't know.

[stderr]

You'd probably have success rolling back to an early g++ version and early libs - something like this:

http://www.linuxquestions.org/questi...ream-h-734338/

[lordbux]

You'd probably have success rolling back to an early g++ version and early libs - something like this:

http://www.linuxquestions.org/questi...ream-h-734338/

You were rite, the problem was due to the updated libraries and compiler.

it seems compiling in command line solves a great deal of problem.
and a few renaming made easier, though i am sure that somewhere
in future i may face a few errors as i have renamed iostream to iostream.h and etc.

Thanks for all your kind support,
You guys make linux Beat.

[COKEDUDE]

Does anyone know what caused these problems?

[stderr]

Glad you got it working again lordbux Good luck with the rest of the project!

edit, @cokedude: It would seem to have been the use of deprecated syntax that appears to have been removed from the g++ compiler relatively recently, the solution to which could be either to go through all the code and update it (rather impractical in lordbux's 80k line project!), or use an earlier version of the compiler.

I had quite an advantage in a sense, in that by the time I came to learn C++ everyone was using namespaces and the newer libraries, so I skipped an extra phase of transition.