hello!
I`am just starting to programm unter linux.
I have some experice in programming with c++.
My question is:

include <iostream.h>

is this working?
are the header files always the same ?
1. is iostream.h iomanip.h eg. known to the compiler under linux?

2. can i write a programm with the vi and than compile this file with a console command? And if... how would this look?


thanx

looks ok as far as includes go, well it should be #include of course. it just searches on the defined include path. i've not got g++ configured on my system properly, but the header files are normally included from /usr/include/g++/ and so forth

that will work. I wrote it in pico, and compiled it with just "g++ test.cpp" and it print the obvious to the screen. header files do change, but not a noticable amount esp on something as engrained as the glibc and such like. Are you aware of the benefits of the whole cout stuff as opposed to the C style printf("arse"); commands? Also are you aware of what #include #define and such like actaully mean. They are preprocessor instructions, and are reomved before the program is compiled, and are replaced with said header files and such like.

#include <iostream.h>

int main()
{
std::cout << "arse" << std::endl;
cout << "Hole!";
return 0;
}

g++ blah.cpp -o blah
./blah

If you have vi editor:
type # vi <filename.cpp>
If you have vim editor:
type # vim <filename.cpp>

Remember the "cpp" extension, else compiler will give error.
Then, write the program in Insert mode (I hope you know vi):

#include <iostream> /*In linux , ".h" isn't necessary with some headers */

int main() //void main gives error in linux.
{
cout<<"Hello"<<endl; //No great need to give namespace
return 0;
}


Save this file.
type at prompt:
# gcc <filename.cpp>

The gcc complier will save the exe file with name a.out. The Linux compliers directly produce executables unless explicitely specified.
Change the file permission to include 'executable permission' if it does not have one.Then type:
# ./a.out
(Don't forget the "./")

And the output is:
#Hello
#

Hope you get it.
bye.

And the output

int main() //void main gives error in linux.
( Posted by Aditya )
As far as the return type is concerned, I think the gnu compiler will take care of it. But it is good to keep this in mind.
--Sarin