Vektoraddition, Subtraktion und Dehnung

$\begin{displaymath}\vec{u} \pm a \vec{v} = \left[ \begin{array}{c} u_{x} \\ u_{y... ...\ u_{y} \pm a v_{y} \\ u_{z} \pm a v_{z} \\ \end{array}\right]\end{displaymath}$

(1.9)

void   VAD(double *v0,double *v1,double *erg){ //Vektoraddition
   register int i;
   for(i=0;i<3;i++){  *(erg+i)       =*(v0+i)        +       *(v1+i);  }; return ;}

void   VSU(double *v0,double *v1,double *erg){ //Vektorsubtraktion
   register int i;
   for(i=0;i<3;i++){  *(erg+i)       =*(v0+i)        -       *(v1+i);  }; return ;}