theme changed

labs/lab9/MyClass/Triangle.cs

@@ -0,0 +1,42 @@
+using System;
+
+class Triangle
+{
+    private int a;
+    private int b;
+    private int c;
+
+    public Triangle(int a, int b, int c)
+    {
+        this.a = a;
+        this.b = b;
+        this.c = c;
+    }
+
+    public void Show()
+    {
+        Console.WriteLine("a: {0}\nb: {1}\nc: {2}", a, b, c);
+    }
+
+    public int Perimeter()
+    {
+        return a + b + c;
+    }
+
+    public double Area()
+    {
+        double p = Perimeter() / 2;
+        return Math.Sqrt(p * (p - a) * (p - b) * (p - c));
+    }
+
+    public bool Exists()
+    {
+        if (a <= 0 || b <= 0 || c <= 0) return false;
+
+        double maxSide = Math.Max(Math.Max(a, b), Math.Max(b, c));
+
+        if (maxSide >= a + b + c - maxSide) return false;
+
+        return true;
+    }
+}