Pascal (Lazarus/Delphi)

JSON Add Large Integer or Double

See more JSON Examples

Demonstrates how to add a large number (larger than what can be held in an integer), or a double/float value to a JSON document. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  json: TJsonObject;
  index: Integer;

begin
  json := TJsonObject.Create;

  //  To add a large integer, use AddNumberAt.

  //  (an index of -1 indicates append).
  index := -1;
  json.AddNumberAt(index,'bignum','8239845689346587465826345892644873453634563456');

  //  Do the same for a double..
  json.AddNumberAt(index,'double','-153634.295');

  json.EmitCompact := False;
  WriteLn(json.Emit());

  //  Output:

  //  	{
  //  	  "bignum": 8239845689346587465826345892644873453634563456,
  //  	  "double": -153634.295
  //  	}


  json.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.