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labs/lab4_done/Utils/Utils.cs

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+class Utils
+{
+    public static int Greater(int a, int b)
+    {
+        if (a > b)
+            return a;
+        else 
+            return b;
+    }
+
+    public static void Swap(ref int a, ref int b)
+    {
+        int temp = a;
+        a = b;
+        b = temp;
+    }
+
+    public static bool Factorial(int n, out int answer)
+    {
+        int k; 
+        int f = 1;
+        bool ok = true;
+        
+        try 
+        {
+            checked
+            {
+                for (k = 2; k <= n; ++k)
+                {
+                    f = f * k;
+                }
+            }
+        }
+        catch (Exception)
+        {
+            f = 0;
+            ok = false;
+        }
+
+        answer = f;
+        return ok;
+    }
+
+}