program to rotate an array clockwise and anti-clockwise

Author: anishsingh20

General Programs/ArrayRotation.cpp

@@ -4,8 +4,75 @@ using namespace std;
 
 //array rotation
 
+void Rotate(int arr[],int d,int n)
+{
+	int temp[d];
+	//copying items in a temp array
+	for(int i = 0 ; i < d; i++)
+	{
+		temp[i] = arr[i];
+		
+	}
+	
+	for(int i = 0 ; i < n ;i++)
+	{
+		arr[i] = arr[i+d];
+	}
+	
+	for(int i = 0 ; i < d ; i++)
+	{
+		arr[n] = temp[i];
+	}
+	
+	for(int i = 0 ; i < n ; i++)
+	{
+		cout<<arr[i]<<" ";
+	}
+	
+	
+}
+
+void leftRotateByOne(int arr[],int n)
+{
+	int temp = arr[0],i;
+	
+	for(i = 0 ; i < n-1 ;i++)
+	{
+		arr[i] = arr[i+1];
+	}
+	
+	arr[i] = temp; //now first element is added to the last
+}
+
+
+void RightRotateByOne(int arr[],int n)
+{
+	int temp = arr[n-1],i;
+	
+	for(i = n-1 ; i > 0 ; i--)
+	{
+		arr[i] = arr[i-1];
+	}
+	
+	arr[i] = temp;
+	
+}
+void RotateEffi(int arr[],int d,int n)
+{
+	for(int i = 0 ; i < d;i++)
+		RightRotateByOne(arr,n);
+		
+	for(int j = 0 ; j < n ; j++)
+	{
+		cout<<arr[j]<<" ";
+	}
+}
+//T(n) = O(n*d)
 
 int main()
 {
+	int arr[]  = {1,2,3,4,5,6,7};
+	int size = sizeof(arr)/sizeof(arr[0]);
+	RotateEffi(arr,3,size);
 	return 0;
 }