reverse an array in cpp

1
2int main(){    
3  	int arr[5] = {1,3,2,4,5};
4	sort(arr, arr+5, greater<int>()); 
5  	// arr == {5,4,3,2,1}
6  	return 0;
7}
8

1#include <iostream>
2using namespace std;
3int main()
4{		// While loop
5	const int SIZE = 9;
6	int arr [SIZE];
7	cout << "Enter numbers: \n";
8	for (int i = 0; i < SIZE; i++)
9		cin >> arr[i];
10	for (int i = 0; i < SIZE; i++)
11		cout << arr[i] << "\t";
12	cout << endl;
13	cout << "Reversed Array:\n";
14	int temp, start = 0, end = SIZE-1;
15	while (start < end)
16	{
17		temp = arr[start];
18		arr[start] = arr[end];
19		arr[end] = temp;
20		start++;
21		end--;
22	}
23	for (int i = 0; i < SIZE; i++)
24		cout << arr[i] << "\t";
25	cout << endl;	
26  	return 0;
27}
28

1#include <iostream>
2#include <algorithm>
3#include <vector>
4#include <iterator>
5using namespace std;
6int main()
7{
8    vector<int>a = {11,22,33,44,99,55};
9    reverse(a.begin(), a.end());
10    auto it = a.begin();
11    for(it= a.begin(); it!=a.end(); it++){
12        cout << *it << ' ';    
13    }
14}
15

1#include <iostream>
2using namespace std;
3int main()
4{
5	const int SIZE = 9;
6	int arr [SIZE];
7	cout << "Enter numbers: \n";
8	for (int i = 0; i < SIZE; i++)
9		cin >> arr[i];
10	for (int i = 0; i < SIZE; i++)
11		cout << arr[i] << "\t";
12	cout << endl;
13	cout << "Reversed Array:\n";
14	int end = SIZE - 1, temp;
15	for (int i = 0; i < end; i++)
16	{
17		temp = arr[i];
18		arr[i] = arr[end];
19		arr[end] = temp;
20		end--;
21	}
22	/*	Reverse using while loop
23	int temp, start = 0, end = SIZE-1;
24	while (start < end)
25	{
26		temp = arr[start];
27		arr[start] = arr[end];
28		arr[end] = temp;
29		start++;
30		end--;
31	}*/
32	for (int i = 0; i < SIZE; i++)
33		cout << arr[i] << "\t";
34	cout << endl;	
35	}
36

1//java program to reverse array using for loop
2public class ReverseArrayDemo 
3{
4   public static void main(String[] args) 
5   {
6      int[] arrNumbers = new int[]{2, 4, 6, 8, 10};  
7      System.out.println("Given array: ");  
8      for(int a = 0; a < arrNumbers.length; a++)
9      {
10         System.out.print(arrNumbers[a] + " ");
11      }
12      System.out.println("Reverse array: ");
13      // looping array in reverse order
14      for(int a = arrNumbers.length - 1; a >= 0; a--) 
15      {  
16         System.out.print(arrNumbers[a] + " ");  
17      }
18   }
19}

1#include<iostream>
2using namespace std;
3int main()
4{   
5     int n=3;
6     int arr[]={1,2,3,4};
7      while (n>=0)
8    {
9        cout<<arr[n];
10        n--;
11      }
12         
13    return 0;
14}