CD Actual 15/CDACTUAL15.iso/cdactual/program/pascal/NUMRPAS.ZIP/NRPAS13.ZIP/GAMMP.PAS

Pascal/Delphi Source File | 1987-03-17 | 354 b | 16 lines

FUNCTION gammp(a,x: real): real;
VAR
   gammcf,gln: real;
BEGIN
   IF ((x < 0.0) OR (a <= 0.0)) THEN BEGIN
      writeln('pause in GAMMP - invalid arguments'); readln
   END;
   IF (x < (a+1.0)) THEN BEGIN
      gser(a,x,gammcf,gln);
      gammp := gammcf
   END ELSE BEGIN
      gcf(a,x,gammcf,gln);
      gammp := 1.0-gammcf
   END
END;