C# 求两个矩阵相交面积

        public class Rectangle
        {
            public int x1;
            public int y1;
            public int x2;
            public int y2;
            public Rectangle(int x1, int y1, int x2, int y2)
            {
                this.x1 = x1;
                this.y1 = y1;
                this.x2 = x2;
                this.y2 = y2;
            }
        }

        static int RectangleArea(Rectangle r1, Rectangle r2)
        {
            int maxx = Math.Max(r1.x1, r2.x1);
            int minx = Math.Min(r1.x2, r2.x2);
            int maxy = Math.Max(r1.y1, r2.y1);
            int miny = Math.Min(r1.y2, r2.y2);

            if (minx>maxx && miny > maxy )
            {
                return (maxx - minx) * (maxy - miny);
            }
            else
            {
                return 0;
            }
        }