sncndn.dem

来自「Delphi Pascal 数据挖掘领域算法包 数值算法大全」· DEM 代码 · 共 28 行

PROGRAM d6r30(input,output,dfile);
(* driver for routine SNCNDN *)
VAR
   cn,dn,em,emmc,sn,uu,val : real;
   i,nval : integer;
   txt : string[26];
   dfile : text;

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

BEGIN
   glopen(dfile,'fncval.dat');
   REPEAT readln(dfile,txt) UNTIL (txt = 'Jacobian Elliptic Function');
   readln(dfile,nval);
   writeln(txt);
   writeln('mc':4,'u':8,'actual':16,'sn':13,
      'sn^2+cn^2':15,'(mc)*(sn^2)+dn^2':18);
   FOR i := 1 to nval DO BEGIN
      readln(dfile,em,uu,val);
      emmc := 1.0-em;
      sncndn(uu,emmc,sn,cn,dn);
      writeln(emmc:5:2,uu:8:2,val:15:5,sn:15:5,
         (sn*sn+cn*cn):12:5,(em*sn*sn+dn*dn):14:5)
   END;
   close(dfile)
END.