gser.dem

来自「Delphi Pascal 数据挖掘领域算法包 数值算法大全」· DEM 代码 · 共 29 行

PROGRAM d6r8(input,output,dfile);
(* driver for routine GSER *)
VAR
   a,gamser,gln,val,x : real;
   i,nval : integer;
   txt : string[25];
   dfile : text;

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

(*$I GSER.PAS *)

BEGIN
   glopen(dfile,'fncval.dat');
   REPEAT readln(dfile,txt) UNTIL (txt = 'Incomplete Gamma Function');
   readln(dfile,nval);
   writeln(txt);
   writeln('a':4,'x':11,'actual':14,'gser(a,x)':14,
         'gammln(a)':12,'gln':8);
   FOR i := 1 to nval DO BEGIN
      readln(dfile,a,x,val);
      gser(a,x,gamser,gln);
      writeln(a:6:2,x:12:6,val:12:6,gamser:12:6,
            gammln(a):12:6,gln:12:6)
   END;
   close(dfile)
END.