Reverse an Array In-Place

Code

#include <stdio.h>

void reverse_array(int arr[], int n) {
    
    int start = 0;
    int end = n - 1;

    
    while (start < end) {
        
        int temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;

        
        start++;
        end--;
    }
}

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);

    // Print the reversed array.
    for (int i = 0; i < n; i++) {
        printf("%d", arr[i]);

        if(i < n - 1) {
            printf(" ");
        }
    }
    printf("\n"); 
    
    return 0;
}

Solving Approach