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double precision function dzasum(n,zx,incx)
c
c takes the sum of the absolute values.
c jack dongarra, 3/11/78.
c modified 3/93 to return if incx .le. 0.
c modified 12/3/93, array(1) declarations changed to array(*)
c
double complex zx(*)
double precision stemp,dcabs1
integer i,incx,ix,n
c
dzasum = 0.0d0
stemp = 0.0d0
if( n.le.0 .or. incx.le.0 )return
if(incx.eq.1)go to 20
c
c code for increment not equal to 1
c
ix = 1
do 10 i = 1,n
stemp = stemp + dcabs1(zx(ix))
ix = ix + incx
10 continue
dzasum = stemp
return
c
c code for increment equal to 1
c
20 do 30 i = 1,n
stemp = stemp + dcabs1(zx(i))
30 continue
dzasum = stemp
return
end
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