定义Point的构造函数

using System;
class Point
{
    public double x, y;
    public Point()
    {
        this.x = 0;
        this.y = 0;
    }

    public Point(double x, double y)
    {
        this.x = x;
        this.y = y;
    }
}

class Test
{
    static void Main()
    {
        Point a = new Point();
        Point b = new Point(3, 4);
    }
}
这样可以吗？

可以的