RosettaCodeData/Task/Goldbachs-comet/Delphi/goldbachs-comet.delphi
2023-07-01 13:44:08 -04:00

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Text

function GetGoldbachCount(N: integer): integer;
{Count number of prime number combinations add up to N }
var I: integer;
begin
Result:=0;
{Look at all number pairs that add up to N}
{And see if they are prime}
for I:=1 to N div 2 do
if IsPrime(I) and IsPrime(N-I) then Inc(Result);
end;
procedure ShowGoldbachComet(Memo: TMemo);
{Show first 100 Goldback numbers}
var I,N,Cnt,C: integer;
var S: string;
begin
Cnt:=0; N:=2; S:='';
while true do
begin
C:=GetGoldbachCount(N);
if C>0 then
begin
Inc(Cnt);
S:=S+Format('%3d',[C]);
if (Cnt mod 10)=0 then S:=S+CRLF;
if Cnt>=100 then break;
end;
Inc(N,2);
end;
Memo.Lines.Add(S);
end;