Data commit

Task/Gapful-numbers/C-sharp/gapful-numbers.cs

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+using System;
+
+namespace GapfulNumbers
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("The first 30 gapful numbers are: ");
+            /* Starting at 100, find 30 gapful numbers */
+            FindGap(100, 30);
+
+            Console.WriteLine("The first 15 gapful numbers > 1,000,000 are: ");
+            FindGap(1000000, 15);
+
+            Console.WriteLine("The first 10 gapful numbers > 1,000,000,000 are: ");
+            FindGap(1000000000, 10);
+
+            Console.Read();
+        }
+
+        public static int firstNum(int n)
+        {
+            /*Divide by ten until the leading digit remains.*/
+            while (n >= 10)
+            {
+                n /= 10;
+            }
+            return (n);
+        }
+
+        public static int lastNum(int n)
+        {
+            /*Modulo gives you the last digit. */
+            return (n % 10);
+        }
+
+        static void FindGap(int n, int gaps)
+        {
+            int count = 0;
+            while (count < gaps)
+            {
+
+                /* We have to convert our first and last digits to strings to concatenate.*/
+                string concat = firstNum(n).ToString() + lastNum(n).ToString();
+                /* And then convert our concatenated string back to an integer. */
+                int i = Convert.ToInt32(concat);
+
+                /* Modulo with our new integer and output the result. */
+                if (n % i == 0)
+                {
+                    Console.Write(n + " ");
+                    count++;
+                    n++;
+                }
+                else
+                {
+                    n++;
+                    continue;
+                }
+            }
+        }
+    }
+}