Instructions for Translation from Pascal to Ada.
by Paul Stachour
28 january 1999 -- v1.3

1. The Job:

     You are a Pascal Programmer.  You are going to write some programs
in Ada.  You want to know about the mappings from Pascal to Ada. Or perhpas
you wish to translate programs from Kruze's data structures book
from Pascal to Ada.  


2.  Translations are to be done from the examples and the following
rules:
            Pascal                      Ada

Comments    { text }                    -- text
Strings     ' '                         " "
units       uses                        with, use
iodefn      use utility;                with text_io; use text_io;
lineio      writeln                     put_line
chario      write                       put
types       type (once)                 type (each type defn)
vars        var                         nothing, uses ":" for defn.
params      var, val                    in out, in, out
ranges      (nothing)                   range
stmt ends   ";" as separator            ";" as terminator
if ends     (nothing)                   end if;
for loop    for I = 1 to Limit do       for I in 1 .. Limit loop
loop ends   (nothing)                   end loop;
pgm ends    end.                        end <pgmname> ;
array mrk   []                          ()
not-equal   <>                          /=
loop exit   do ... until (<exp>)       loop ... exit when (<exp>) end loop;
iomain      required                   (nothing)
constant    const                      constant
chars       char                       character
File posn   main is first              main is last
keywords    entry loop etc             need a new name, like "item"
with X do   with X do ... top count    loop  S.top S.cout ... end loop
function    function Name (..) : type; function Name (..) return type is
fctn ret    FunctionName := ,expr>;    return <expr> ;
Pointers    ^                          access
sub term    var b: boolean);           b: out boolean) is ...

3.  Compiling and linking

3a) On a w3.1 machine, use

    gcc -c  foo.adb
    gnatbl foo.ali

3b) On a w95/w98/Wnt machine, use

     Gnat Ada IDE
     Run| compile
     Run| link
     Run| build  (when window has main program only)

4. Running

4a) on a w3.1 machine, just type the name of the program, like

     ch7_ts

4b) On a w95/w98/Wnt machine, use

     Gnat Ada IDE
     Run| execute
     run| Run captured