C 代码 写出给定阶的高斯-勒让德正交规则 集成密度为 1 的函数 在区间 [-1，+1] 内.rar

20 January 2020 01:01:48 PM LEGENDRE_RULE C version Compiled on Jan 20 2020 at 12:58:06. Compute a Gauss-Legendre rule for approximating Integral ( A <= x <= B ) f(x) dx of order ORDER. The user specifies ORDER, A, B and FILENAME. ORDER 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. ORDER = 4 A = -1 B = 1 FILENAME = "leg_o4". Creating quadrature files. Root file name is "leg_o4". Weight file will be "leg_o4_w.txt". Abscissa file will be "leg_o4_x.txt". Region file will be "leg_o4_r.txt". LEGENDRE_RULE: Normal end of execution. 20 January 2020 01:01:48 PM