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MODULE MSR
IMPLICIT NONE
CONTAINS
subroutine amuxms (n, x, y, a,ja)
real*8 x(*), y(*), a(*)
integer n, ja(*)
integer i, k
do 10 i=1, n
y(i) = a(i)*x(i)
10 continue
do 100 i = 1,n
do 99 k=ja(i), ja(i+1)1
y(i) = y(i) + a(k) *x(ja(k))
99 continue
100 continue
return
end
END MODULE
PROGRAM MSRtest
USE MSR
IMPLICIT NONE
INTEGER :: i
REAL(KIND(0.D0)), DIMENSION(4) :: y, x= (/0.,1.3,4.2,0.8/)
REAL(KIND(0.D0)), DIMENSION(9) :: AA = (/ 1.01, 4.07, 6.08, 9.9, 0., 2.34, 3.12, 1.06, 2.2/)
INTEGER , DIMENSION(9) :: JA = (/6, 7, 7, 8, 10, 3, 1, 1, 3/)
CALL amuxms(4,x,y,aa,ja)
WRITE(6,FMT='(4F8.3)') (y(I), I=1,4)
END PROGRAM
 