考虑以下代码:if(xPoint>0&&yPoint>0){m_navigations=Directions.SouthEast;}elseif(xPoint>0&&yPoint0){m_navigations=Directions.SouthWest;}elseif(xPoint0){m_navigations=Directions.South;}elseif(xPoint>0&&yPoint==0){m_navigations=Directions.East;}elseif(xPoint这很丑陋，我想使用switchcase，但如何使用switch与2变数？我想到了类似this的事