Write a program to reverse an array

 Here we are performing swap method in orginal array.

Input:

5

1 2 3 4 5

Output: 

5 4 3 2 1

Solution: 

//Reverse Array 

#include<iostream>

using namespace std;

void print_array(int arr[], int size){

    for (int i = 0; i < size; i++)

    {

        cout<<arr[i]<<" ";

    }

    cout<<endl;

}

void reverse_array(int arr[], int start, int end){

    while (start<end) // 5 4 3 2 1 

    {                 // 1 2 3 4 5

        int temp = arr[start];

        arr[start] = arr[end];

        arr[end] = temp;

        start++;

        end--;

    }

}

int main(){

    int n;

    cin>>n;

    int arr[n];

    for (int i = 0; i < n; i++)

    {

        cin>>arr[i];

    }

    cout<<"Previous Array"<<endl;

    print_array(arr,n);

    reverse_array(arr, 0, n-1);

    cout<<"Reverse Array"<<endl;

    print_array(arr, n);

    return 0;

    

}

Video Solution :