freepascal.compiler/docs/stringex/ex12.pp

Program Example12;

Uses strings;

{ Program to demonstrate the StrLCat function. }

Const P1 : PChar = '1234567890';

Var P2 : PChar;

begin
  P2:=StrAlloc (StrLen(P1)*2+1);
  P2^:=#0; { Zero length }
  StrCat (P2,P1);
  StrLCat (P2,P1,5); 
  Writeln ('P2 = ',P2);
end.