d4r10.txt

来自「《Delphi常用数值算法集》的配书源码」· 文本 代码 · 共 30 行

implementation
//PROGRAM D4R10
//Driver for routine ERF
uses
  unit2;
  {$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
var
  ACTUAL:array[1..5] of REAL;X:array[1..5] of real;
  F:TextFile;   j:Integer;
const
  s1='%14.7f'; s2='%6.2f';
begin
  ACTUAL[1]:= 0.2227026;    ACTUAL[2]:= 0.742101;
  ACTUAL[3]:= 0.8427008;    ACTUAL[4]:= 0.910314;
  ACTUAL[5]:= 0.9890905;
  X[1]:= 0.2;    X[2]:= 0.8;
  X[3]:= 1;    X[4]:= 1.2;
  X[5]:= 1.8;
  //输出计算结果到文件
  AssignFile(F, 'd:\delphi_shu\p4\d4r10.dat');
  Rewrite(F);
  Writeln(F, '    X        Actual        ERF(X)');
  For j:= 1 To 5 do
    Writeln(F,Format(s2,[X[j]]),Format(s1,[Actual[j]]),
        Format(s1,[ERF(X[j])]));
  CloseFile(F);
  //屏幕显示计算结果
  memo1.Lines.LoadFromFile('d:\delphi_shu\p4\d4r10.dat');
end;