mcva1.f90

来自「数值计算和数值分析在Fortran下的特殊函数库,是数值计算的必备」· F90 代码 · 共 25 行

MODULE cva1_func
 
! From the book "Computation of Special Functions"
!      by Shanjie Zhang and Jianming Jin
!   Copyright 1996 by John Wiley & Sons, Inc.
! The authors state:
!   "However, we give permission to the reader who purchases this book
!    to incorporate any of these programs into his or her programs
!    provided that the copyright is acknowledged."
 
IMPLICIT NONE
INTEGER, PARAMETER  :: dp = SELECTED_REAL_KIND(12, 60)
 
CONTAINS


SUBROUTINE cva1(kd, m, q, cv)

!       ============================================================
!       Purpose: Compute a sequence of characteristic values of
!                Mathieu functions
!       Input :  M  --- Maximum order of Mathieu functions
!                q  --- Parameter of Mathieu functions
!                KD --- Case code
!                       KD=1 for cem(x,q)  ( m = 0,2,4,