C#二元一次方程参数求解

using System;namespace Demo{       class PRogram    {        private static readonly int _decimaldigits = 2;//小数位数保留2位        /// <summary>        /// 计算斜率k及纵截距b值        /// </summary>        /// <param name="x1">坐标点x1</param>        /// <param name="x2">坐标点x2</param>        /// <param name="y1">坐标点y1</param>        /// <param name="y2">坐标点y2</param>        /// <param name="kvalue">斜率k值</param>        /// <param name="bvalue">纵截距b值</param>        private static void Calculate(float x1, float x2, float y1, float y2, ref float kvalue, ref float bvalue)//求方程y=kx+b 系数 k ,b        {            float coefficient = 1;//系数值            try            {                if ((x1 == 0) || (x2 == 0) || (x1 == x2)) return; //排除为零的情况以及x1，x2相等时无法运算的情况                //if (y1 == y2) return; //根据具体情况而定，如何这两个值相等，得到的就是一条直线                float temp = 0;                if (x1 >= x2)                {                    coefficient = (float)Math.Round((x1 / x2), _decimaldigits);                    temp = y2 * coefficient; //将对应的函数乘以系数                    bvalue = (float)Math.Round(((temp - y1) / (coefficient - 1)), _decimaldigits);                    kvalue = (float)Math.Round(((y1 - bvalue) / x1), _decimaldigits); //求出k值                }                else                {                    coefficient = x2 / x1;                    temp = y1 * coefficient;                    bvalue = (float)Math.Round(((temp - y2) / (coefficient - 1)), _decimaldigits);//求出b值                    kvalue = (float)Math.Round(((y2 - bvalue) / x2), _decimaldigits); //求出k值                }            }            catch            {                Console.WriteLine("x系数不能为0或相等");            }        }        static void Main(string[] args)        {            float x1 = 0;            float y1 = 0;            float x2 = 0;            float y2 = 0;            float kvalue = 0;            float bvalue = 0;            Console.WriteLine("计算直线斜率k及纵截距b");            Console.WriteLine("请输入x1值");            x1 = Convert.ToSingle(Console.ReadLine());            Console.WriteLine("请输入y1值");            y1 = Convert.ToSingle(Console.ReadLine());            Console.WriteLine("请输入x2值");            x2 = Convert.ToSingle(Console.ReadLine());            Console.WriteLine("请输入y2值");            y2 = Convert.ToSingle(Console.ReadLine());            Calculate(x1, x2, y1, y2, ref kvalue, ref bvalue);            Console.WriteLine("直线方程为：y={0}x+{1}", kvalue, bvalue);            Console.ReadKey();          }    }}