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cs1/C Sharp 1_5/Program.cs

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+using System;
+using static System.Math;
+
+namespace C_Sharp_1_5
+{
+    public class Program
+    {
+        static void Main()
+        {
+            double a, b, c, delta, real, imag;
+            Console.Write("请输入系数a");
+            a = double.Parse(Console.ReadLine());
+            Console.Write("请输入系数b");
+            b = double.Parse(Console.ReadLine());
+            Console.Write("请输入系数c");
+            c = double.Parse(Console.ReadLine());
+            if (a == 0 && b == 0)
+            {
+                Console.WriteLine("该方程无解");
+            }
+            else
+            {
+                delta = b * b - 4 * a * c;
+                if (delta > 0)
+                {
+                    double x1 = (-b + Sqrt(delta)) / (2 * a);
+                    double x2 = (-b - Sqrt(delta)) / (2 * a);
+                    Console.WriteLine("该方程有两个不等实根，分别为：x1={0},x2={1}", x1, x2);
+                }
+                else if (delta == 0)
+                {
+                    double x = -b / (2 * a);
+                    Console.WriteLine("该方程有两个相等实根，均为：x={0}", x);
+                }
+                else
+                {
+                    real = -b / (2 * a);
+                    imag = Sqrt(-delta) / (2 * a);
+                    Console.WriteLine("该方程有两个共轭复根，分别为：x1={0}+{1}i,x2={0}-{1}i", real, imag);
+                }
+            }
+        }
+    }
+}