用c#解一元二期方程程序

代码说明：

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            double x1 = 0;            double x2 = 0;            Console.WriteLine("求 ax^2+bx+c=0 的解");            Console.Write("请输入a的值：");            double a = Convert.ToInt32(Console.ReadLine());            Console.Write("请输入b的值：");  &nb