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GAMMP.PAS
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Pascal/Delphi Source File
|
1991-04-29
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354b
|
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;