man cscal (Fonctions bibliothèques) - scales a vector by a constant.
NAME
CSCAL - scales a vector by a constant.
SYNOPSIS
- subroutine cscal(n,ca,cx,incx)
- c scales a vector by a constant.
- c jack dongarra, linpack, 3/11/78.
- c modified to correct problem with negative increment, 8/21/90.
- complex ca,cx(1)
- integer i,incx,ix,n
- if(n.le.0)return
- if(incx.eq.1)go to 20
- c code for increment not equal to 1
- ix = 1
- if(incx.lt.0)ix = (-n+1)*incx + 1
- do 10 i = 1,n
- cx(ix) = ca*cx(ix)
- ix = ix + incx
- 10 continue
- return
- c code for increment equal to 1
- 20 do 30 i = 1,n
- cx(i) = ca*cx(i)
- 30 continue
- return
- end