27 March 2024 07:53:39 AM

zero_brent_test():
  C version
  Test zero_brent(), which seeks a root of a function F(X)
  in an interval [A,B].

  f_01(x) = sin ( x ) - x / 2

      A                 X             B
    F(A)              F(X)          F(B)

        1.000000        1.895494        2.000000
    3.414710e-01    0.000000e+00   -9.070257e-02
  Number of calls to F = 8

  f_02(x) = 2 * x - exp ( - x )

      A                 X             B
    F(A)              F(X)          F(B)

        0.000000        0.351734        1.000000
   -1.000000e+00    0.000000e+00    1.632121e+00
  Number of calls to F = 7

  f_03(x) = x * exp ( - x )

      A                 X             B
    F(A)              F(X)          F(B)

       -1.000000        0.000000        0.500000
   -2.718282e+00    2.675179e-24    3.032653e-01
  Number of calls to F = 12

  f_04(x) = exp ( x ) - 1 / ( 100 * x * x )

      A                 X             B
    F(A)              F(X)          F(B)

        0.000100        0.095345       20.000000
   -9.999990e+05   -2.220446e-16    4.851652e+08
  Number of calls to F = 16

  f_05(x) = (x+3) * (x-1) * (x-1)

      A                 X             B
    F(A)              F(X)          F(B)

       -5.000000       -3.000000        2.000000
   -7.200000e+01    0.000000e+00    5.000000e+00
  Number of calls to F = 14

zero_brent_test():
  Normal end of execution.

27 March 2024 07:53:39 AM