Instructions on Setting Up Ada for DOS

OK, I got a simple compilation working.
Go to this ftp site (open in Firefox or IE)
ftp://ftp.cs.kuleuven.ac.be/pub/Ada-Belgium/mirrors/gnu-ada/3.15p/winnt/

and download the gnat-3.15p-nt.exe file. running this file will install the ada compiler.
we do not really need an IDE (integrated development environment). we can start with just command line.
it should install to c:\gnat
inside c:\gnat\bin, there are a bunch of executables, but all are runnable from the one program gnat
so type gnat and you will see the options.
copy to that directory ..\examples\hello.ada, so that you need not worry about other directories.
hello.ada is the source program.

Then:
gnat compile hello.adb
(this will create a file hello.ali)
gnat bind -x hello.ali
(then we need to link)
gnat link hello.ali
(and finally will run the program)
hello

the output will be:
Hello World. Welcome to GNAT

similar steps are available for gnat on other platforms