CPP program to rotate an array

In this article we will learn to implement a CPP program to rotate an array. A  C++ program is provided below to rotate an array m number of times and print the array. Array is rotated right m times and final array elements are printed.

Program is as follows:

#include <iostream>
using namespace std;
int main()
{
	int n;
	cout<<"Enter no. of elements: ";
	cin>>n;
	int a[n];
	cout<<"Enter "<<n<<" numbers: ";
	for(int i=0; i<n; i++)
	{
		cin>>a[i];
	}
	int m;
	cout<<"Enter no. of rotations: ";
	cin>>m;
	for(int i=1; i<=m; i++)
	{
		for(int j=1; j<n; j++)
		{
			int temp = a[j];
			a[j] = a[0];
			a[0] = temp;
		}
	}
	cout<<"After "<<m<<" rotations, array is: ";
	for(int i=0; i<n; i++)
		cout<<a[i]<<" ";
	return 0;
}

Input and output for the above program are as follows:

Enter no. of elements: 5
Enter 5 numbers: 1 2 3 4 5
Enter no. of rotations: 4
After 4 rotations, array is: 2 3 4 5 1

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.