adds vector B to vector A Vect& operator+=( Vect& vectA, const Vect& vectB )

What will be an ideal response?

```
{
double xcomp, ycomp;

xcomp = vectA.xcomponent( vectA ) + vectB.xcomponent( vectB );
ycomp = vectA.ycomponent( vectA ) + vectB.ycomponent( vectB );

vectA.r = sqrt( (xcomp * xcomp) + (ycomp * ycomp));

vectA.theta = atan( ycomp / xcomp );
//if quadrant II, add Pi
if( xcomp > 0 && ycomp < 0 )
vectA.theta += Pi;
//if quadrant III, add Pi
else if( xcomp < 0 && ycomp < 0 )
vectA.theta += Pi;
//if quadrant IV, add 2*Pi
else if( xcomp > 0 && ycomp < 0 )
vectA.theta += 2 * Pi;

return vectA;

```