d4r9.txt

《Delphi常用数值算法集》的配书源码

implementation
//PROGRAM D4R9
//Driver for routine GCF
uses
  unit2;
{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
var
  ACTUAL:array[1..5] of real;A,X:array[1..5] of real;
  F:TextFile;   j:Integer;  GAMMCF,GLN:REAL;
const
  s1='%6.2F';s2='%11.6f';
begin
  ACTUAL[1]:=0.010104;    ACTUAL[2]:=0.006738;
  ACTUAL[3]:=0.006855;    ACTUAL[4]:=0.017406;
  ACTUAL[5]:=0.059573;
  A[1]:=0.1;              A[2]:=1;
  A[3]:=2;                A[4]:=6;
  A[5]:=11;
  X[1]:=1.581139;         X[2]:=5;
  X[3]:=7.071068;         X[4]:=12.24745;
  X[5]:=16.58312;
  //输出计算结果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r9.dat');
  Rewrite(F);
  Writeln(F, '   A        X        Actual    GCF(A,X)  GAMMLN(A)    GLN');
  For j:= 1 To 5 do
  begin
      GCF(GAMMCF, A[j], X[j], GLN);
      Writeln(F,Format(s1,[A[j]]),Format(s2,[X[j]]),
                    Format(s2,[Actual[j]]),Format(s2,[GAMMCF]),
                    Format(s2,[GAMMLN(A[J])]),Format(s2,[GLN]));
  end;
  CloseFile(F);
  //屏幕显示计算结果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r9.dat');
end;