add Programmyday form github

Parkplatz/Parkboxen.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Parkplatz
+{
+    internal class Parkboxen
+    {
+        private Auto? auto;
+        
+        public bool einparken(Auto auto) 
+        {
+            if (this.auto == null)
+            {
+                this.auto = auto;
+                return true;
+            }
+            else return false;
+        }
+        public Auto ausparken(string kennzeichen)
+        {
+            if (this.auto.GetKennzeichen() == kennzeichen)
+            {
+                Auto h = this.auto;
+                this.auto = null;
+                return h;
+            }
+            else return null;
+        }
+        public bool istleer() { return this.auto == null; }
+
+    }
+}