编程求一元二次方程。ax²+bx+c=0（a≠0）

<img src="https://img-blog.youkuaiyun.com/20141026123653296?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc2VuY2hlbmc2MTE5/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast" alt="" />using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {

            double a, b, c;
            Console.WriteLine("请输入a,b,c:");
            a = Convert.ToDouble(Console.ReadLine());
            b = Convert.ToDouble(Console.ReadLine());
            c = Convert.ToDouble(Console.ReadLine());
            if (Math.Pow(b, 2) - 4 * a * c >= 0)
            {
                Console.WriteLine("x1=" + (-b + Math.Sqrt(b * b - 4 * a * c)) / (2 * a));
                Console.WriteLine("x1=" + (-b - Math.Sqrt(b * b - 4 * a * c)) / (2 * a));
            }
            else
            {
                Console.WriteLine("无解！");
                Console.Read();

            }


        }
    }

总结：我学会了编程求一元二次方程，非常有意思。