/*  -- translated by f2c (version 19940927).

   You must link the resulting object file with the libraries:

	-lf2c -lm   (in that order)

*/

#include "f2c.h"

/* Subroutine */ int zscal_(integer *n, doublecomplex *za, doublecomplex *zx, 

	integer *incx)

{

    /* System generated locals */

    integer i__1, i__2, i__3;

    doublecomplex z__1;

    /* Local variables */

    static integer i, ix;

/*     scales a vector by a constant.   

       jack dongarra, 3/11/78.   

       modified 3/93 to return if incx .le. 0.   

       modified 12/3/93, array(1) declarations changed to array(*)   

   Parameter adjustments   

       Function Body */

#define ZX(I) zx[(I)-1]

    if (*n <= 0 || *incx <= 0) {

	return 0;

    }

    if (*incx == 1) {

	goto L20;

    }

/*        code for increment not equal to 1 */

    ix = 1;

    i__1 = *n;

    for (i = 1; i <= *n; ++i) {

	i__2 = ix;

	i__3 = ix;

	z__1.r = za->r * ZX(ix).r - za->i * ZX(ix).i, z__1.i = za->r * ZX(

		ix).i + za->i * ZX(ix).r;

	ZX(ix).r = z__1.r, ZX(ix).i = z__1.i;

	ix += *incx;

/* L10: */

    }

    return 0;

/*        code for increment equal to 1 */

L20:

    i__1 = *n;

    for (i = 1; i <= *n; ++i) {

	i__2 = i;

	i__3 = i;

	z__1.r = za->r * ZX(i).r - za->i * ZX(i).i, z__1.i = za->r * ZX(

		i).i + za->i * ZX(i).r;

	ZX(i).r = z__1.r, ZX(i).i = z__1.i;

/* L30: */

    }

    return 0;

} /* zscal_ */