Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
    // Your logic here
    for(int i=0; i<n/2; i++)
    {
        int temp=arr[i];
        arr[i]=arr[(n-1)-i];
        arr[(n-1)-i]=temp;
        // printf("%d %d %d\n",arr[i],arr[(n-1)-i],i);
    }
    // for(int j=0; j<n; j++)
    // {
    //     printf("%d",arr[j]);
    //     if(j!=(n-1)) printf(" ");
    // }
}

int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    reverse_array(arr, n);

    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);
        if(i < n-1){
        	printf(" ");
        }
    }
    return 0;
}

Solving Approach

 

 

 

Upvote
Downvote
Loading...

Input

5 1 2 3 4 5

Expected Output

5 4 3 2 1