erf.dem

Delphi Pascal 数据挖掘领域算法包 数值算法大全

PROGRAM d6r10(input,output,dfile);
(* driver for routine ERF *)
VAR 
   i,nval : integer;
   val,x : real;
   txt : string[14];
   dfile : text;

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

(*$I GSER.PAS *)

(*$I GCF.PAS *)

(*$I GAMMP.PAS *)

(*$I ERF.PAS *)

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