lazarus-ccr/components/fpspreadsheet/examples/other/test_recursive_calc.pas

57 lines
1.4 KiB
ObjectPascal

{ This demo is a test for recursive calculation of cells. The cell formulas
are constructed such that the first cell depends on the second, and the second
cell depends on the third one. Only the third cell contains a number.
Therefore calculation has to be done recursively until the independent third
cell is found. }
program test_recursive_calc;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}{$IFDEF UseCThreads}
cthreads,
{$ENDIF}{$ENDIF}
Classes, laz_fpspreadsheet
{ you can add units after this },
math, fpspreadsheet, fpsfunc;
var
workbook: TsWorkbook;
worksheet: TsWorksheet;
begin
workbook := TsWorkbook.Create;
try
worksheet := workbook.AddWorksheet('Calc_test');
worksheet.Options := worksheet.Options + [soCalcBeforeSaving];
worksheet.WriteColWidth(0, 20);
// A1
worksheet.WriteUTF8Text(0, 0, '=B2+1');
// B1
worksheet.WriteRPNFormula(0, 1, CreateRPNFormula(
RPNCellValue('B2',
RPNNumber(1,
RPNFunc(fekAdd, nil)))));
// A2
worksheet.WriteUTF8Text(1, 0, '=B3+1');
// B2
worksheet.WriteRPNFormula(1, 1, CreateRPNFormula(
RPNCellValue('B3',
RPNNumber(1,
RPNFunc(fekAdd, nil)))));
// A3
worksheet.WriteUTF8Text(2, 0, '(not dependent)');
// B3
worksheet.WriteNumber(2, 1, 1);
workbook.WriteToFile('test_calc.xls', sfExcel8, true);
finally
workbook.Free;
end;
end.