using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication7{ class point { public int x, y; public point() { x = 0; y = 0; } public point(int x, int y) { this.x = x; this.y = y; } public override string ToString() { return (string.Format("({0},{1})", x, y)); } } class Program { static void Main(string[] args) { point p1 = new point(); point p2 = new point(5, 3); [color=#FF0000] Console.WriteLine("P1点对应的坐标为{0}", p1);[/color] Console.ReadKey(); } }}