array rotation using reverse algorithm

Author: anishsingh20

General Programs/ArrayRotation.cpp

@@ -2,7 +2,50 @@
 
 using namespace std;
 
-//array rotation
+/*array rotation
+1)Rotating one by one
+2)Reversal algorithm
+*/
+
+
+void reverseArr(int arr[],int start,int end)
+{
+	while(start < end)
+	{
+		swap(arr[start++],arr[end--]);
+		
+	}
+}
+
+void RotateSimpleClock(int arr[],int d,int n)
+{
+	reverseArr(arr,n-d,n-1);
+	
+	reverseArr(arr,0,n-d-1);
+	
+	reverseArr(arr,0,n-1);
+	
+	for(int i = 0 ; i < n ; i++)
+	{
+		cout<<arr[i]<<" ";
+	}
+}
+
+
+void RotateSimpleAntiClock(int arr[],int d,int n)
+{
+	reverseArr(arr,0,d-1);
+	
+	reverseArr(arr,d,n-1);
+	
+	reverseArr(arr,0,n-1);
+	
+	for(int i = 0 ; i < n ; i++)
+	{
+		cout<<arr[i]<<" ";
+	}
+}
+
 
 void Rotate(int arr[],int d,int n)
 {
@@ -73,6 +116,10 @@ int main()
 {
 	int arr[]  = {1,2,3,4,5,6,7};
 	int size = sizeof(arr)/sizeof(arr[0]);
-	RotateEffi(arr,3,size);
+	RotateSimpleClock(arr,2,size);
+	cout<<endl;
+	
+	int arr1[]  = {1,2,3,4,5,6,7};
+	RotateSimpleAntiClock(arr1,2,size);
 	return 0;
 }