Re: OFF-TOPIC: Algol 60 guru required

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From: "Kevin J. Cummings" <cummings@xxxxxxxxxxxxxxxxxx>

Classic ALGOL-60 requires that a subscript-list be enclosed in square
brackets.  I would expect your statement should read:

D[N+1]:=N[N+2]:=0.0;

But this doesn't answer the question of N.  Is it an INTEGER scalar?
INTEGER array? INTEGER procedure? Its the N(N+2) part that bothers
me.

The actual definitions of D and N would help here.

An assignment statement is defined as:

<left-part-list><expression>

and a left-part-list is one or more

<variable> :=

where each variable in the <left-part-list> receives the value of the
<expression>.

First of all, thanks everybody for your responses.
Here's a fragment of the initial code:
PROCEDURE QUINEQ(INTEGER VALUE N1,N2; REAL ARRAY Y,B,C,D,E,F(*));
  IF N2>N1+1 THEN
  BEGIN
     INTEGER N;
     REAL P,Q,R,S,T,U,V;
     N:=N2-3;  P:=Q:=R:=S:=T:=0.0;
     FOR I:=N1 STEP 1 UNTIL N DO
     BEGIN
        U:=P*R;  B(I):=1.0/(66.0-U*R-Q);
        C(I):=R:=26.0-U;
        D(I):=Y(I+3)-3.0*(Y(I+2)-Y(I+1))-Y(I)-U*S-Q*T;
        Q:=P;  P:=B(I);  T:=S;  S:=D(I)
     END I;
     D(N+1):=N(N+2):=0.0;
And quotation from paper (year of publication: 1976), that describes the algorithm: "These procedures have been tested in Algol 60 on the Telefunken TR-440 computer at the Leibniz-Rechenzentrum of the Bavarian Academy of Sciences, Munich, and in Algol W on the I B M 360/67 at the Stanford Center for Information Processing." It's accessible here: http://portal.acm.org/citation.cfm?id=355694.355701


BTW, I'm just curious how you're handling the "pass by name" stuff....

I had little problem with modification of it. I just auto-replaced 'PROCEDURE' to 'void', 'BEGIN' to '{', and so on. Then I had only to change by hand FOR and IF-constructions, that is:
FOR I:=N STEP -1 UNTIL N1 DO
IF N2>N1+1 THEN
--
Hiisi.
Registered Linux User #487982. Be counted at: http://counter.li.org/

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