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⤷ Comparing of two strings
If symbol of second string is equal to symbol of first string, then we will write '*' symbol, else we will write symbol of second string. So you will get all symbols, which are present in both strings.
procedure TForm1.Button1Click(Sender: TObject);
var
MinLen, i: Integer;
Str1, Str2: string;
begin
Edit3.Text:='';
if (Length(Edit1.Text)>=Length(Edit2.Text)) then
MinLen:=Length(Edit2.Text)
else
MinLen:=Length(Edit1.Text);
Str1:=Edit1.Text;
Str2:=Edit2.Text;
for i:=1 to MinLen do
if Str1[i]=Str2[i] then Edit3.Text:=Edit3.Text+'*'
else Edit3.Text:=Edit3.Text+Str2[i];
end;
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