Initial commit

C Sharp 1_2/Program.cs

@@ -0,0 +1,29 @@
+using System;
+namespace C_Sharp_1_2
+{
+    public class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.Write("请输入三角形的边长a：");
+            double a = double.Parse(Console.ReadLine());
+            Console.Write("请输入三角形的边长b：");
+            double b = double.Parse(Console.ReadLine());
+            Console.Write("请输入三角形的边长c：");
+            double c = double.Parse(Console.ReadLine());
+            if (a + b > c && a + c > b && b + c > a)
+            {
+                double perimeter = a + b + c;
+                double s = (a + b + c) / 2;
+                double area = Math.Sqrt(s * (s - a) * (s - b) * (s - c));
+                Console.WriteLine("三角形的三边长为：a={0}，b={1}，c={2}", a, b, c);
+                Console.WriteLine("三角形的周长为{0}，面积为：{1}",perimeter,area);
+            }
+            else
+            {
+                Console.WriteLine("输入的边长不能构成三角形。");
+            }
+            Console.ReadLine();
+        }
+    }
+}