add HW9

HomeWork.cs

@@ -335,6 +335,21 @@
 
             return snakeArray;
         }
+        
+        public int Task_64(int number)
+        {
+            if (number / 10 != 0)
+                return 1 + Task_64(number / 10);
+            return 1;
+        }
+
+        public int Task_66(int M, int N)
+        {
+            if (N == M-1)
+                return 0;
+            return N + Task_66(M, N-1);
+
+        }
 
 
 

README.md

@@ -41,3 +41,8 @@
 - [X] Task_54
 - [X] Task_56
 - [X] Task_62
+
+
+## HW9
+- [X] Task_64
+- [X] Task_66

Start.cs

@@ -37,7 +37,7 @@ public class Start
         Tools myTools = new Tools();
 
         Console.Write("Wich task: ");
-        Console.WriteLine("WH8 is 54, 56, 62");
+        Console.WriteLine("WH9 is 64, 66");
 //        Console.WriteLine("WH3 is 19, 23");
         int taskNumver = Convert.ToInt32(Console.ReadLine());
         switch (taskNumver)
@@ -175,6 +175,20 @@ public class Start
                 int n = Convert.ToInt32(Console.ReadLine());
                 myTools.ShowInt2dArray(HW.Task_62(n));
                 break;
+            
+            case 64:
+                Console.WriteLine("Input number: ");
+                int number64 = Convert.ToInt32(Console.ReadLine());
+                Console.WriteLine("Count numbers is: "+HW.Task_64(number64));
+                break;
+            
+            case 66:
+                Console.WriteLine("Input M: ");
+                int M = Convert.ToInt32(Console.ReadLine());
+                Console.WriteLine("Input N: ");
+                int N = Convert.ToInt32(Console.ReadLine());
+                Console.WriteLine("Summ is: "+HW.Task_66(M, N)+ $" between numbers {M} and {N} ");
+                break;