erfc.dem

Delphi Pascal 数据挖掘领域算法包 数值算法大全

PROGRAM d6r11(input,output,dfile);
(* driver for routine ERFC *)
VAR
   i,nval : integer;
   val,x : real;
   txt : string[14];
   dfile : text;

(*$I MODFILE.PAS *)
(*$I GAMMLN.PAS *)

(*$I GCF.PAS *)

(*$I GSER.PAS *)

(*$I GAMMQ.PAS *)

(*$I GAMMP.PAS *)

(*$I ERFC.PAS *)

BEGIN
   glopen(dfile,'fncval.dat');
   REPEAT readln(dfile,txt) UNTIL (txt = 'Error Function');
   readln(dfile,nval);
   writeln ('complementary error function');
   writeln ('x':5,'actual':12,'erfc(x)':12);
   FOR i := 1 to nval DO BEGIN
      readln(dfile,x,val);
      val := 1.0-val;
      writeln(x:6:2,val:12:7,erfc(x):12:7)
   END;
   close(dfile);
END.