[Sync Iteration] csharp/bird-watcher/1

solutions/csharp/bird-watcher/1/BirdWatcher.cs

@@ -0,0 +1,51 @@
+class BirdCount
+{
+    private int[] birdsPerDay;
+
+    public BirdCount(int[] birdsPerDay)
+    {
+        this.birdsPerDay = birdsPerDay;
+    }
+
+    public static int[] LastWeek()
+    {
+        return new int[] { 0, 2, 5, 3, 7, 8, 4 };
+    }
+
+    public int Today()
+    {
+        return birdsPerDay[6];
+    }
+
+    public void IncrementTodaysCount()
+    {
+        birdsPerDay[6]++;
+    }
+
+    public bool HasDayWithoutBirds()
+    {
+        foreach(int day in birdsPerDay){
+            if(day == 0)
+                return true;
+        }
+        return false;
+    }
+
+    public int CountForFirstDays(int numberOfDays)
+    {
+        int numOfBirds = 0;
+        for(int day = 0; day < numberOfDays; day++){
+            numOfBirds += birdsPerDay[day];
+        }
+        return numOfBirds;
+    }
+
+    public int BusyDays()
+    {
+        int busyDays = 0;
+        foreach(int day in birdsPerDay){
+            busyDays += day >= 5 ? 1 : 0;
+        }
+        return busyDays;
+    }
+}