Start from reading and writing file

1.you can even install GNUstep on Windows, but I have started on Ubuntu, there is no point of the switch. Just save the link:
http://www.gnustep.org/experience/Windows.html
2. Can't find the header file
some said it could be fixed by running the commands, sudo apt-get -y install build-essential
but it doesn't work for me. Still need to work on this tomorrow
3.One apple game dev forum:
http://www.idevgames.com/forum/index.php

First objective-c program

1.install the GNUstep and objective-c
sudo apt-get -y install build-essential
sudo apt-get -y install gnustep
sudo apt-get install gobjc
sudo apt-get install gnustep-make
sudo apt-get install libgnustep-base-dev

And in the GNUmakefile I added this path,this will be used in the makefile script:
GNUSTEP_MAKEFILES=/usr/lib/GNUstep/System/Makefiles
Setting the makefile envirements:
source /usr/lib/GNUstep/System/Library/Makefiles/GNUstep.sh

2.try to compile the first objective-c program
http://www.gnustep.org/resources/documentation/Developer/Base/ProgrammingManual/manual_1.html#SEC11