Skalarprodukt

$$\vec{u} \vec{v} = \left[ \begin{array}{c} u_{x} \\ u_{y} \\ u... ...\ \end{array}\right] = u_{x} v_{x} + u_{y} v_{y} + u_{z} v_{z}$$ (1.10)

double SPR(double *v0,double *v1){//Skalarprodukt
   register int i; double wert=0.0;
   for(i=0;i<3;i++){  wert   = wert + *(v0+i)  *  *(v1+i);};
   return wert;
}