28 November 2022 3:13:18.104 PM CCN_RULE FORTRAN90 version Compute a nested Clenshaw Curtis rule for approximating Integral ( A <= x <= B ) f(x) dx of order N. The user specifies N, A, B and FILENAME. N is the number of points; A is the left endpoint; B is the right endpoint; FILENAME is used to generate 3 files: filename_w.txt - the weight file filename_x.txt - the abscissa file. filename_r.txt - the region file. N = 9 A = -1.00000 B = 1.00000 FILENAME = "ccn_o9". Creating quadrature files. "Root" file name is "ccn_o9". Weight file will be "ccn_o9_w.txt". Abscissa file will be "ccn_o9_x.txt". Region file will be "ccn_o9_r.txt". CCN_RULE: Normal end of execution. 28 November 2022 3:13:18.105 PM