Sum of the digits of n is substring of n: Difference between revisions

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<pre>0 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 109 119 129 139 149 159 169 179 189 199 200 300 400 500 600 700 800 900 910 911 912 913 914 915 916 917 918 919</pre>
<pre>0 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 109 119 129 139 149 159 169 179 189 199 200 300 400 500 600 700 800 900 910 911 912 913 914 915 916 917 918 919</pre>

=={{header|Delphi}}==
{{works with|Delphi|6.0}}
{{libheader|SysUtils,StdCtrls}}


<syntaxhighlight lang="Delphi">


{This code would normally be in a library, but is included here for clarity}

procedure GetDigits(N: integer; var IA: TIntegerDynArray);
{Get an array of the integers in a number}
{Numbers returned from least to most significant}
var T,I,DC: integer;
begin
DC:=Trunc(Log10(N))+1;
SetLength(IA,DC);
for I:=0 to DC-1 do
begin
T:=N mod 10;
N:=N div 10;
IA[I]:=T;
end;
end;


procedure SumDigitsSubstring(Memo: TMemo);
var N,J,Cnt,Sum: integer;
var Dg: TIntegerDynArray;
var NS,SS,S: string;
begin
S:='';
Cnt:=0;
for N:=0 to 1000-1 do
begin
GetDigits(N,Dg);
Sum:=0;
for J:=0 to High(Dg) do
Sum:=Sum+Dg[J];
NS:=IntToStr(N);
SS:=IntToStr(Sum);
if Pos(SS,NS)>0 then
begin
Inc(Cnt);
S:=S+Format('%4d',[N]);
if (Cnt mod 10)=0 then S:=S+CRLF;
end;
end;
Memo.Lines.Add(S);
end;



</syntaxhighlight>
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<pre>
0 1 2 3 4 5 6 7 8 9
10 20 30 40 50 60 70 80 90 100
109 119 129 139 149 159 169 179 189 199
200 300 400 500 600 700 800 900 910 911
912 913 914 915 916 917 918 919

Elapsed Time: 1.433 ms.

</pre>



=={{header|Draco}}==
=={{header|Draco}}==
Retrieved from "https://rosettacode.org/wiki/Sum_of_the_digits_of_n_is_substring_of_n"