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114 lines
2.8 KiB
Plaintext
Executable File
114 lines
2.8 KiB
Plaintext
Executable File
-- File: DirectPolynomialRoots.cdl
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-- Created: Mon May 13 16:47:42 1991
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-- Author: Laurent PAINNOT
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-- <lpa@topsn3>
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---Copyright: Matra Datavision 1991, 1992
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class DirectPolynomialRoots from math
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---Purpose:
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-- This class implements the calculation of all the real roots of a real
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-- polynomial of degree <= 4 using a direct method. Once found,
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-- the roots are polished using the Newton method.
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uses OStream from Standard
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raises RangeError from Standard,
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InfiniteSolutions from StdFail
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is
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Create(A, B, C, D, E: Real)
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---Purpose:
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-- computes all the real roots of the polynomial
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-- Ax4 + Bx3 + Cx2 + Dx + E using a direct method.
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returns DirectPolynomialRoots;
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Create(A, B, C, D: Real)
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---Purpose:
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-- computes all the real roots of the polynomial
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-- Ax3 + Bx2 + Cx + D using a direct method.
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returns DirectPolynomialRoots;
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Create(A, B, C: Real)
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---Purpose:
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-- computes all the real roots of the polynomial
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-- Ax2 + Bx + C using a direct method.
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returns DirectPolynomialRoots;
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Create(A, B: Real)
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---Purpose:
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-- computes the real root of the polynomial Ax + B.
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returns DirectPolynomialRoots;
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Solve(me: in out; A, B, C, D, E: Real)
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is static protected;
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Solve(me: in out; A, B, C, D: Real)
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is static protected;
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Solve(me: in out; A, B, C: Real)
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is static protected;
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Solve(me: in out; A, B: Real)
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is static protected;
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IsDone(me)
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---Purpose: Returns true if the computations are successful, otherwise returns false.
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---C++: inline
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returns Boolean
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is static;
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InfiniteRoots(me)
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---Purpose: Returns true if there is an infinity of roots, otherwise returns false.
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---C++: inline
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returns Boolean
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is static;
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NbSolutions(me)
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---Purpose: returns the number of solutions.
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-- An exception is raised if there are an infinity of roots.
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---C++: inline
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returns Integer
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raises InfiniteSolutions
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is static;
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Value(me; Nieme: Integer)
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---Purpose: returns the value of the Nieme root.
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-- An exception is raised if there are an infinity of roots.
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-- Exception RangeError is raised if Nieme is < 1
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-- or Nieme > NbSolutions.
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---C++: inline
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returns Real
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raises InfiniteSolutions, RangeError
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is static;
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Dump(me; o: in out OStream)
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---Purpose: Prints on the stream o information on the current state
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-- of the object.
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-- Is used to redefine the operator <<.
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is static;
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fields
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Done: Boolean;
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InfiniteStatus: Boolean;
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NbSol: Integer;
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TheRoots: Real[4];
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end DirectPolynomialRoots;
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