c#类的使用示例

namespace Test_Class
{
    class ElementType
    {
        private int value;
        public ElementType() { value = 0; }
        public ElementType(int _v)
        {
            this.value = _v;
        }
        public void disp()
        {
            Console.WriteLine("value is {0}", value);
        }
        public void edit(int _v)
        {
            this.value = _v;
        }
        public int reff()
        {
            return this.value;
        }
    }
    class package
    {
        private ElementType x;
        private ElementType y;
        public package()
        {
            this.x = new ElementType();
            this.y = new ElementType();
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="_x">x</param>
        /// <param name="_y">y</param>
        public package(int _x, int _y)
        {
            this.x = new ElementType(_x);
            this.y = new ElementType(_y);
        }
        public void disp()
        {
            Console.WriteLine("package display");
            Console.WriteLine("\tx vaule is {0}", this.x.reff());
            Console.WriteLine("\ty vaule is {0}", this.y.reff());
            Console.WriteLine();
        }
        /// <summary>
        /// 修改值
        /// </summary>
        /// <param name="_x">x</param>
        /// <param name="_y">y</param>
        public void modify(int _x, int _y)
        {
            this.x.edit(_x);
            this.y.edit(_y);
        }
        public void copyto(ref package p)
        {
            p.modify(this.x.reff(), this.y.reff());
        }
    }
}

namespace Test_Class
{
    class Program
    {
        static void Main(string[] args)
        {
            package p1 = new package(5, 5);
            package p0 = new package();
            p0.disp();
            p1.disp();
            p1.copyto(ref p0);
            p0.disp();
            p0.modify(10, 50);
            p0.disp();
            Console.ReadLine();
        }
    }
}